题解 | 大整数哈希
大整数哈希
https://www.nowcoder.com/practice/29f0cff8a69b4ab6a2f63fb7386defa3
n = int(input())
mod = 2**64
res = 0
d = {}
for i in range(n):
x,y = map(int,input().split())
if x not in d:
res += (i+1)*0
d[x] = y
else:
res += (i+1) * d[x]
d[x] = y
print(int(res%mod))
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