Buggy python submission (verdict: Runtime Error):
import sys
def input(): return sys.stdin.readline().strip()
def mapint(): return map(int, input().split())
sys.setrecursionlimit(10**9)

N, M, S = mapint()
graph = [{} for _ in range(N)]
for _ in range(M):
    u, v, a, t = mapint()
    graph[u-1][v-1] = (a, t)
    graph[v-1][u-1] = (a, t)

change = [list(mapint()) for _ in range(N)]
from heapq import heappop, heappush
# time, silver, vertex
Q = [(0, S, 0)]
dist = [[10**18]*2501 for _ in range(N)]
dist[0][S] = 0

while Q:
    t, s, v = heappop(Q)
    rate, change_time = change[v]
    if s<2500 and dist[v][min(2500, s+rate)]>t+change_time:
        dist[v][min(2500, s+rate)] = t+change_time
        heappush(Q, (t+change_time, min(2500, s+rate), v))
    for nx in graph[v].keys():
        nx_s, nx_t = graph[v][nx]
        if nx_s<=s and dist[nx][s-nx_s]>t+nx_t:
            dist[nx][s-nx_s] = t+nx_t
            heappush(Q, (t+nx_t, s-nx_s, nx))
for i in range(1, N):
    print(min(dist[i]))

Fixed submission:
import sys
def input(): return sys.stdin.readline().strip()
def mapint(): return map(int, input().split())
sys.setrecursionlimit(10**9)

N, M, S = mapint()
S = min(S, N*50)
query = [[[] for _ in range(N*50+1)] for _ in range(N)]
for _ in range(M):
    u, v, a, b = mapint()
    for coin in range(a, N*50+1):
        query[u-1][coin].append((v-1, a, b))
        query[v-1][coin].append((u-1, a, b))
for i in range(N):
    c, d = mapint()
    for coin in range(N*50+1):
        query[i][coin].append((i, -c, d))

inf = 10**18
dp = [[inf]*(N*50+1) for _ in range(N)]
dp[0][0] = 0

import heapq
queue = [(0, 0, S)]
checked = [0]*N
cnt = 0

while queue:
    t, now, coin = heapq.heappop(queue)
    if cnt==N:
        break
    if not checked[now]:
        checked[now] = 1
        cnt += 1
    qlis = query[now][coin]
    for nx, a, b in qlis:
        if 0<=coin-a:
            coin = min(coin, N*50+a)
            if t+b<dp[nx][coin-a]:
                dp[nx][coin-a] = t+b
                heapq.heappush(queue, (t+b, nx, coin-a))

for i in range(1, N):
    print(min(dp[i]))

Buggy python submission (verdict: Time Limit Exceeded):
import sys
def input(): return sys.stdin.readline().strip()
def mapint(): return map(int, input().split())
sys.setrecursionlimit(10**9)

N, M, S = mapint()
query = [[(-1, -1)]*N for _ in range(N)]
for _ in range(M):
    u, v, a, b = mapint()
    query[u-1][v-1] = (a, b)
    query[v-1][u-1] = (a, b)
exchange = [list(mapint()) for _ in range(N)]

inf = 10**18
dp = [[inf]*(N*50) for _ in range(N)]
dp[0][0] = 0

import heapq
queue = [(0, 0, S)]
checked = [0]*N
cnt = 0

while queue:
    t, now, coin = heapq.heappop(queue)
    if cnt==N:
        break
    if not checked[now]:
        checked[now] = 1
        cnt += 1
    rate, time = exchange[now]
    if coin<N*50:
        i = 0
        while coin+rate*i<N*50:
            if t+i*time<dp[now][coin+rate*i]:
                dp[now][coin+rate*i] = t+i*time
                for nx in range(N):
                    a, b = query[now][nx]
                    if a!=-1 and coin+rate*i>=a and dp[nx][coin+rate*i-a]>t+i*time+b:
                        heapq.heappush(queue, (t+i*time+b, nx, coin+rate*i-a))
            i += 1
    else:
        coin = N*50-1
        if t<dp[now][coin]:
            dp[now][coin] = t
            for nx in range(N):
                a, b = query[now][nx]
                if a!=-1 and coin>=a and dp[nx][coin-a]>t+b:
                    heapq.heappush(queue, (t+b, nx, coin-a))  

for i in range(1, N):
    print(min(dp[i]))
        


Fixed submission:
import sys
def input(): return sys.stdin.readline().strip()
def mapint(): return map(int, input().split())
sys.setrecursionlimit(10**9)

N, M, S = mapint()
S = min(S, N*50)
query = [[[] for _ in range(N*50+1)] for _ in range(N)]
for _ in range(M):
    u, v, a, b = mapint()
    for coin in range(a, N*50+1):
        query[u-1][coin].append((v-1, a, b))
        query[v-1][coin].append((u-1, a, b))
for i in range(N):
    c, d = mapint()
    for coin in range(N*50+1):
        query[i][coin].append((i, -c, d))

inf = 10**18
dp = [[inf]*(N*50+1) for _ in range(N)]
dp[0][0] = 0

import heapq
queue = [(0, 0, S)]
checked = [0]*N
cnt = 0

while queue:
    t, now, coin = heapq.heappop(queue)
    if cnt==N:
        break
    if not checked[now]:
        checked[now] = 1
        cnt += 1
    qlis = query[now][coin]
    for nx, a, b in qlis:
        if 0<=coin-a:
            coin = min(coin, N*50+a)
            if t+b<dp[nx][coin-a]:
                dp[nx][coin-a] = t+b
                heapq.heappush(queue, (t+b, nx, coin-a))

for i in range(1, N):
    print(min(dp[i]))