Buggy python submission (verdict: Runtime Error):
n,m = map(int, input().split())

bridges = []
for i in range(m):
    bridges.append([int(x) for x in input().split()])

def root(par, a):
    while par[a] != -1:
       a = par[a]
    return a 

def unite(par, npar, depth, ra, rb):
    if depth[ra] >= depth[rb]:
        npar[ra] = npar[ra] + npar[rb]
        par[rb] = ra
        if depth[ra] == depth[rb]:
            depth[ra] += 1
    else:
        npar[rb] = npar[rb] + npar[ra]
        par[ra] = rb

par = [-1 for _ in range(n+1)]
npar = [1 for _ in range(n+1)]
depth = [1 for _ in range(n+1)]

ans = []
unconf = n*(n-1)//2
ans.append(unconf)

for x in reversed(bridges):
    a,b = x
    ra = root(par, ifpar, a)
    rb = root(par, ifpar, b)
    if ra != rb:
        tmp = npar[ra] * npar[rb]
        unite(par, ifpar, npar, depth, ra, rb)
        unconf -= tmp
    ans.append(unconf)

ans.reverse()
ans.pop(0)
for x in ans:
    print(x)

Fixed submission:
n,m = map(int, input().split())

bridges = []
for i in range(m):
    bridges.append([int(x) for x in input().split()])
'''
g = list(range(n+1))
ng = [1 for _ in range(n+1)]
gl = [[i] for i in range(n+1)]
ans = []
unconf = n*(n-1)//2
ans.append(unconf)


for x in reversed(bridges):
    a,b = x
    if g[a] != g[b]:
        tmp = ng[g[a]] * ng[g[b]]
        ng[g[a]] = ng[g[a]]+ng[g[b]]
        gl[g[a]] = gl[g[a]] + gl[g[b]]
        for y in gl[g[b]]:
            g[y] = g[a]
        unconf -= tmp
        ans.append(unconf)
    else:
        ans.append(unconf)


ans.reverse()
ans.pop(0)
for x in ans:
    print(x)
'''
def root(par, ifpar, a):
    while ifpar[a] != 1:
       a = par[a]
    return a 

def unite(cnt, par, ifpar, npar, depth, ra, rb):
    if depth[ra] >= depth[rb]:
        npar[ra] = npar[ra] + npar[rb]
        par[rb] = ra
        ifpar[rb] = 0
        if depth[ra] == depth[rb]:
            depth[ra] += 1
    else:
        npar[rb] = npar[rb] + npar[ra]
        par[ra] = rb
        ifpar[ra] = 0

par = list(range(n+1))
ifpar = [1 for _ in range(n+1)]
npar = [1 for _ in range(n+1)]
depth = [1 for _ in range(n+1)]

ans = []
unconf = n*(n-1)//2
ans.append(unconf)
cnt = 0

for x in reversed(bridges):
    a,b = x
    ra = root(par, ifpar, a)
    rb = root(par, ifpar, b)
    if ra != rb:
        tmp = npar[ra] * npar[rb]
        unite(cnt, par, ifpar, npar, depth, ra, rb)
        unconf -= tmp
    ans.append(unconf)
    cnt += 1

ans.reverse()
ans.pop(0)
for x in ans:
    print(x)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int, input().split())

bridges = []
for i in range(m):
    bridges.append([int(x) for x in input().split()])
'''
g = list(range(n+1))
ng = [1 for _ in range(n+1)]
gl = [[i] for i in range(n+1)]
ans = []
unconf = n*(n-1)//2
ans.append(unconf)


for x in reversed(bridges):
    a,b = x
    if g[a] != g[b]:
        tmp = ng[g[a]] * ng[g[b]]
        ng[g[a]] = ng[g[a]]+ng[g[b]]
        gl[g[a]] = gl[g[a]] + gl[g[b]]
        for y in gl[g[b]]:
            g[y] = g[a]
        unconf -= tmp
        ans.append(unconf)
    else:
        ans.append(unconf)


ans.reverse()
ans.pop(0)
for x in ans:
    print(x)
'''
def root(par, ifpar, a):
    while ifpar[a] != 1:
       a = par[a]
    return a 

def unite(cnt, par, ifpar, npar, ra, rb):
    if cnt % 2 == 0:
        npar[ra] = npar[ra] + npar[rb]
        par[rb] = ra
        ifpar[rb] = 0
    else:
        npar[rb] = npar[rb] + npar[ra]
        par[ra] = rb
        ifpar[ra] = 0

par = list(range(n+1))
ifpar = [1 for _ in range(n+1)]
npar = [1 for _ in range(n+1)]

ans = []
unconf = n*(n-1)//2
ans.append(unconf)
cnt = 0

for x in reversed(bridges):
    a,b = x
    ra = root(par, ifpar, a)
    rb = root(par, ifpar, b)
    if ra != rb:
        tmp = npar[ra] * npar[rb]
        unite(cnt, par, ifpar, npar, ra, rb)
        unconf -= tmp
    ans.append(unconf)
    cnt += 1

ans.reverse()
ans.pop(0)
for x in ans:
    print(x)



















Fixed submission:
n,m = map(int, input().split())

bridges = []
for i in range(m):
    bridges.append([int(x) for x in input().split()])
'''
g = list(range(n+1))
ng = [1 for _ in range(n+1)]
gl = [[i] for i in range(n+1)]
ans = []
unconf = n*(n-1)//2
ans.append(unconf)


for x in reversed(bridges):
    a,b = x
    if g[a] != g[b]:
        tmp = ng[g[a]] * ng[g[b]]
        ng[g[a]] = ng[g[a]]+ng[g[b]]
        gl[g[a]] = gl[g[a]] + gl[g[b]]
        for y in gl[g[b]]:
            g[y] = g[a]
        unconf -= tmp
        ans.append(unconf)
    else:
        ans.append(unconf)


ans.reverse()
ans.pop(0)
for x in ans:
    print(x)
'''
def root(par, ifpar, a):
    while ifpar[a] != 1:
       a = par[a]
    return a 

def unite(cnt, par, ifpar, npar, depth, ra, rb):
    if depth[ra] >= depth[rb]:
        npar[ra] = npar[ra] + npar[rb]
        par[rb] = ra
        ifpar[rb] = 0
        if depth[ra] == depth[rb]:
            depth[ra] += 1
    else:
        npar[rb] = npar[rb] + npar[ra]
        par[ra] = rb
        ifpar[ra] = 0

par = list(range(n+1))
ifpar = [1 for _ in range(n+1)]
npar = [1 for _ in range(n+1)]
depth = [1 for _ in range(n+1)]

ans = []
unconf = n*(n-1)//2
ans.append(unconf)
cnt = 0

for x in reversed(bridges):
    a,b = x
    ra = root(par, ifpar, a)
    rb = root(par, ifpar, b)
    if ra != rb:
        tmp = npar[ra] * npar[rb]
        unite(cnt, par, ifpar, npar, depth, ra, rb)
        unconf -= tmp
    ans.append(unconf)
    cnt += 1

ans.reverse()
ans.pop(0)
for x in ans:
    print(x)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int, input().split())

bridges = []
for i in range(m):
    bridges.append([int(x) for x in input().split()])
'''
g = list(range(n+1))
ng = [1 for _ in range(n+1)]
gl = [[i] for i in range(n+1)]
ans = []
unconf = n*(n-1)//2
ans.append(unconf)


for x in reversed(bridges):
    a,b = x
    if g[a] != g[b]:
        tmp = ng[g[a]] * ng[g[b]]
        ng[g[a]] = ng[g[a]]+ng[g[b]]
        gl[g[a]] = gl[g[a]] + gl[g[b]]
        for y in gl[g[b]]:
            g[y] = g[a]
        unconf -= tmp
        ans.append(unconf)
    else:
        ans.append(unconf)


ans.reverse()
ans.pop(0)
for x in ans:
    print(x)
'''
def root(par, ifpar, a):
    while ifpar[a] != 1:
       a = par[a]
    return a 

def unite(par, ifpar, ra,rb):
    par[rb] = ra
    ifpar[rb] = 0


par = list(range(n+1))
ifpar = [1 for _ in range(n+1)]
npar = [1 for _ in range(n+1)]

ans = []
unconf = n*(n-1)//2
ans.append(unconf)

for x in reversed(bridges):
    a,b = x
    ra = root(par, ifpar, a)
    rb = root(par, ifpar, b)
    if ra != rb:
        tmp = npar[ra] * npar[rb]
        npar[ra] = npar[ra] + npar[rb]
        unite(par, ifpar, ra, rb)
        unconf -= tmp
    ans.append(unconf)

ans.reverse()
ans.pop(0)
for x in ans:
    print(x)

Fixed submission:
n,m = map(int, input().split())

bridges = []
for i in range(m):
    bridges.append([int(x) for x in input().split()])
'''
g = list(range(n+1))
ng = [1 for _ in range(n+1)]
gl = [[i] for i in range(n+1)]
ans = []
unconf = n*(n-1)//2
ans.append(unconf)


for x in reversed(bridges):
    a,b = x
    if g[a] != g[b]:
        tmp = ng[g[a]] * ng[g[b]]
        ng[g[a]] = ng[g[a]]+ng[g[b]]
        gl[g[a]] = gl[g[a]] + gl[g[b]]
        for y in gl[g[b]]:
            g[y] = g[a]
        unconf -= tmp
        ans.append(unconf)
    else:
        ans.append(unconf)


ans.reverse()
ans.pop(0)
for x in ans:
    print(x)
'''
def root(par, ifpar, a):
    while ifpar[a] != 1:
       a = par[a]
    return a 

def unite(cnt, par, ifpar, npar, depth, ra, rb):
    if depth[ra] >= depth[rb]:
        npar[ra] = npar[ra] + npar[rb]
        par[rb] = ra
        ifpar[rb] = 0
        if depth[ra] == depth[rb]:
            depth[ra] += 1
    else:
        npar[rb] = npar[rb] + npar[ra]
        par[ra] = rb
        ifpar[ra] = 0

par = list(range(n+1))
ifpar = [1 for _ in range(n+1)]
npar = [1 for _ in range(n+1)]
depth = [1 for _ in range(n+1)]

ans = []
unconf = n*(n-1)//2
ans.append(unconf)
cnt = 0

for x in reversed(bridges):
    a,b = x
    ra = root(par, ifpar, a)
    rb = root(par, ifpar, b)
    if ra != rb:
        tmp = npar[ra] * npar[rb]
        unite(cnt, par, ifpar, npar, depth, ra, rb)
        unconf -= tmp
    ans.append(unconf)
    cnt += 1

ans.reverse()
ans.pop(0)
for x in ans:
    print(x)

Buggy python submission (verdict: Time Limit Exceeded):
n,m = map(int, input().split())

bridges = []
for i in range(m):
    bridges.append([int(x) for x in input().split()])

g = list(range(n+1))
ng = [1 for _ in range(n+1)]
gl = [[i] for i in range(n+1)]
ans = []
unconf = n*(n-1)//2
ans.append(unconf)


for x in reversed(bridges):
    a,b = x
    if g[a] != g[b]:
        tmp = ng[g[a]] * ng[g[b]]
        ng[g[a]] = ng[g[a]]+ng[g[b]]
        gl[g[a]] = gl[g[a]] + gl[g[b]]
        for y in gl[g[b]]:
            g[y] = g[a]
        unconf -= tmp
        ans.append(unconf)
    else:
        ans.append(unconf)


ans.reverse()
ans.pop(0)
for x in ans:
    print(x)

Fixed submission:
n,m = map(int, input().split())

bridges = []
for i in range(m):
    bridges.append([int(x) for x in input().split()])
'''
g = list(range(n+1))
ng = [1 for _ in range(n+1)]
gl = [[i] for i in range(n+1)]
ans = []
unconf = n*(n-1)//2
ans.append(unconf)


for x in reversed(bridges):
    a,b = x
    if g[a] != g[b]:
        tmp = ng[g[a]] * ng[g[b]]
        ng[g[a]] = ng[g[a]]+ng[g[b]]
        gl[g[a]] = gl[g[a]] + gl[g[b]]
        for y in gl[g[b]]:
            g[y] = g[a]
        unconf -= tmp
        ans.append(unconf)
    else:
        ans.append(unconf)


ans.reverse()
ans.pop(0)
for x in ans:
    print(x)
'''
def root(par, ifpar, a):
    while ifpar[a] != 1:
       a = par[a]
    return a 

def unite(cnt, par, ifpar, npar, depth, ra, rb):
    if depth[ra] >= depth[rb]:
        npar[ra] = npar[ra] + npar[rb]
        par[rb] = ra
        ifpar[rb] = 0
        if depth[ra] == depth[rb]:
            depth[ra] += 1
    else:
        npar[rb] = npar[rb] + npar[ra]
        par[ra] = rb
        ifpar[ra] = 0

par = list(range(n+1))
ifpar = [1 for _ in range(n+1)]
npar = [1 for _ in range(n+1)]
depth = [1 for _ in range(n+1)]

ans = []
unconf = n*(n-1)//2
ans.append(unconf)
cnt = 0

for x in reversed(bridges):
    a,b = x
    ra = root(par, ifpar, a)
    rb = root(par, ifpar, b)
    if ra != rb:
        tmp = npar[ra] * npar[rb]
        unite(cnt, par, ifpar, npar, depth, ra, rb)
        unconf -= tmp
    ans.append(unconf)
    cnt += 1

ans.reverse()
ans.pop(0)
for x in ans:
    print(x)