Buggy python submission (verdict: Runtime Error):
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.size(root_x) < self.size(root_y):
                root_x,root_y = root_y,root_x
            self.par[root_y] += self.par[root_x]
            self.par[root_x] = root_y
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]
 
"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N+1)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
#N = 10**6
#M=10**5
#edges = [(2*i,2*i+1) for i in range(M)]
solve(edges,N,M)

Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)

Buggy python submission (verdict: Runtime Error):

class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]

    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.size(root_x) < self.size(root_y):
                root_x,root_y = root_y,root_x
            self.par[root_y] += self.par[root_x]
            self.par[root_x] = root_y
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)
uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):

    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
#N = 10**5
#M=10**4
#edges = [(3*i,3*i+1) for i in range(10**4)]
solve(edges,N,M)



Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)

Buggy python submission (verdict: Runtime Error):

class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]

    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.size(root_x) < size(root_y):
                root_x,root_y = root_y, root_x
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)
uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):

    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N+1)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
#N = 10**5
#M=10**4
#edges = [(3*i,3*i+1) for i in range(10**4)]
solve(edges,N,M)



Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)

Buggy python submission (verdict: Runtime Error):

class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]

    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            self.par[root_y] += self.par[root_x]
            self.par[root_x] = root_y
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)
uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):

    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N+1)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
#N = 10**5
#M=10**4
#edges = [(3*i,3*i+1) for i in range(10**4)]
solve(edges,N,M)



Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)

Buggy python submission (verdict: Runtime Error):

class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]

    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            self.par[root_y] += self.par[root_x]
            self.par[root_x] = root_y
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)
uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):

    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N+3)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]-1) * uf.size(edge[1]-1)
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(int, input().split())) for _ in range(M)]
    return N,M,edges

get_input()
#N = 10**5
#M=10**4
#edges = [(3*i,3*i+1) for i in range(10**4)]
solve(edges,N,M)



Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)

Buggy python submission (verdict: Runtime Error):

class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]

    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
            
            
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            self.par[root_y] += self.par[root_x]
            self.par[root_x] = root_y
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)
uf.unite(1,4)
print(uf.size_dict)
"""


N,M = map(int, input().split())
edges = [tuple(map(int, input().split())) for _ in range(M)]
score= N*(N-1)//2
outputs = [score]
uf = UnionFind(N+3)
for edge in edges[::-1]:
    if not uf.same(*edge):
        score -= uf.size(edge[0]) * uf.size(edge[1])
        uf.unite(*edge)
    outputs.append(score)
for i in range(M):
    print(int(outputs[M-i-1]))



Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)

Buggy python submission (verdict: Runtime Error):

class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]

    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection 
            self.par[x] =self.root(self.par[x])
            return self.par[x]
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            pass
        else:
            self.par[root_y] += self.par[root_x]
            self.par[root_x] = root_y
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)
uf.unite(1,4)
print(uf.size_dict)
"""


N,M = [ int(i) for i in input().split(" ")]
edges = [ tuple([ int(num)-1 for num in  input().split(" ")]) for _ in range(M) ]
score= N*(N-1)//2
outputs = [score]
uf = UnionFind(N)
for edge in edges[::-1]:
    if not uf.same(*edge):
        score -= uf.size(edge[0]) * uf.size(edge[1])
        uf.unite(*edge)
    outputs.append(score)
for i in range(M):
    print(int(outputs[M-i-1]))



Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)

Buggy python submission (verdict: Runtime Error):

class UnionFind:
    def __init__(self, length):
        self.par = [_ for _ in range(length)]
        self.size_dict  = dict([(i,1) for i in range(length)])

    def root(self,x):
        if (self.par[x] == x):
             return x
        else:
            #change connection 
            self.par[x] =self.root(self.par[x])
            return self.par[x]
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            pass
        else:
            self.par[root_x] = root_y
            self.size_dict[root_y] += self.size_dict[root_x]
            self.size_dict[root_x] = -1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        root_x = self.root(x)
        return self.size_dict[root_x]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)
uf.unite(1,4)
print(uf.size_dict)
"""


N,M = [ int(i) for i in input().split(" ")]
edges = [ tuple([ int(num)-1 for num in  input().split(" ")]) for _ in range(M) ]
score= N*(N-1)//2
outputs = [score]
uf = UnionFind(N)
for edge in edges[::-1]:
    if not uf.same(*edge):
        score -= uf.size(edge[0]) * uf.size(edge[1])
        uf.unite(*edge)
    outputs.append(score)
for i in range(M):
    print(int(outputs[M-i-1]))



Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)

Buggy python submission (verdict: Runtime Error):

class UnionFind:
    def __init__(self, length):
        self.par = [_ for _ in range(length)]
        self.size_dict  = dict([(i,1) for i in range(length)])

    def root(self,x):
        if (self.par[x] == x):
             return x
        else:
            #change connection 
            self.par[x] =self.root(self.par[x])
            return self.par[x]
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            pass
        else:
            self.par[root_x] = root_y
            self.size_dict[root_y] += self.size_dict[root_x]
            self.size_dict[root_x] = -1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        root_x = self.root(x)
        return self.size_dict[root_x]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)
uf.unite(1,4)
print(uf.size_dict)
"""


N,M = [ int(i) for i in input().split(" ")]
edges = [ tuple([ int(num)-1 for num in  input().split(" ")]) for _ in range(M) ]
score= N*(N-1)/2
outputs = [score]
uf = UnionFind(N)
for edge in edges[::-1]:
    if not uf.same(*edge):
        score -= uf.size(edge[0]) * uf.size(edge[1])
        uf.unite(*edge)
    outputs.append(score)
for i in range(M):
    print(int(outputs[M-i-1]))



Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)

Buggy python submission (verdict: Runtime Error):

class UnionFind:
    def __init__(self, length):
        self.par = [_ for _ in range(length)]
        self.size_dict  = dict([(i,1) for i in range(length)])

    def root(self,x):
        if (self.par[x] == x):
             return x
        else:
            #change connection 
            self.par[x] =self.root(self.par[x])
            return self.par[x]
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            pass
        else:
            self.par[root_x] = root_y
            self.size_dict[root_y] += self.size_dict[root_x]
            self.size_dict[root_x] = -1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        root_x = self.root(x)
        return self.size_dict[root_x]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)
uf.unite(1,4)
print(uf.size_dict)
"""


N,M = [ int(i) for i in input().split(" ")]
edges = [ tuple([ int(num)-1 for num in  input().split(" ")]) for _ in range(M) ]
score= N*(N-1)/2
outputs = [score]
uf = UnionFind(N)
for edge in edges[:0:-1]:
    if not uf.same(*edge):
        score -= uf.size(edge[0]) * uf.size(edge[1])
        uf.unite(*edge)
    outputs.append(score)

for i in outputs[::-1]:
    print(int(i))


Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)

Buggy python submission (verdict: Runtime Error):
from typing import List

class UnionFind:
    def __init__(self, length):
        self.par:List[int] = [_ for _ in range(length)]
        self.size_dict:dict  = dict([(i,1) for i in range(length)])

    def root(self,x:int):
        if (self.par[x] == x):
             return x
        else:
            #change connection 
            self.par[x] =self.root(self.par[x])
            return self.par[x]
    
    def unite(self,x:int,y:int):
        root_x:int = self.root(x)
        root_y:int = self.root(y)
        if (root_x==root_y):
            pass
        else:
            self.par[root_x] = root_y
            self.size_dict[root_y] += self.size_dict[root_x]
            self.size_dict[root_x] = -1
        
    def same(self,x:int,y:int)->bool:
        root_x:int = self.root(x)
        root_y:int = self.root(y)
        return root_x == root_y 
    
    def size(self,x:int)->int:
        root_x = self.root(x)
        return self.size_dict[root_x]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)
uf.unite(1,4)
print(uf.size_dict)
"""


N,M = [ int(i) for i in input().split(" ")]
edges = [ tuple([ int(num)-1 for num in  input().split(" ")]) for _ in range(M) ]
score= N*(N-1)/2
outputs = [score]
uf = UnionFind(N)
for edge in edges[::-1]:
    if not uf.same(*edge):
        score -= uf.size(edge[0]) * uf.size(edge[1])
        uf.unite(*edge)
    outputs.append(score)

for i in outputs[::-1]:
    print(int(i))


Fixed submission:
class UnionFind:
    def __init__(self, length):
        self.par = [-1 for _ in range(length)]
        self.rank = [0 for _ in range(length)]
 
    def root(self,x):
        if (self.par[x] < 0 ):
             return x
        else:
            #change connection
            root = self.root(self.par[x])
            self.par[x] = root
            return root
    
    def unite(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        if (root_x==root_y):
            return 
        else:
            if self.rank[root_x] < self.rank[root_y]:
                self.par[root_y] += self.par[root_x]
                self.par[root_x] = root_y

            else:
                self.par[root_x] += self.par[root_y]
                self.par[root_y] = root_x
                if self.rank[root_x] == self.rank[root_y]:
                    self.rank[root_x]+=1
        
    def same(self,x,y):
        root_x = self.root(x)
        root_y = self.root(y)
        return root_x == root_y 
    
    def size(self,x):
        return -self.par[self.root(x)]

"""
uf = UnionFind(5)
uf.unite(3,4)
uf.unite(1,2)

uf.unite(1,4)
print(uf.size_dict)
"""
def solve(edges,N,M):
 
    score= N*(N-1)//2
    outputs = [score]
    uf = UnionFind(N)
    for edge in edges[::-1]:
        if not uf.same(*edge):
            score -= uf.size(edge[0]) * uf.size(edge[1])
            uf.unite(*edge)
        outputs.append(score)
    for i in range(M):
        print(int(outputs[M-i-1]))

def get_input():
    N,M = map(int, input().split())
    edges = [tuple(map(lambda x:  int(x)-1, input().split())) for _ in range(M)]
    return N,M,edges

N,M,edges = get_input()
# = 10**6
#M=10**5
#import numpy as np
#edges = [(np.random.randint(N),np.random.randint(N)) for i in range(M)]
solve(edges,N,M)