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python/TangDou/CSP-J/J2-2022/pow.cpp

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2025-08-30 18:35:01 +08:00
#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
int main() {
freopen("pow.in", "r", stdin);
freopen("pow.out", "w", stdout);
LL a, b, res = 1;
cin >> a >> b;
//需要对a==1进行特判,否则肯定会TLE一个点,为啥呢?因为b的范围!它是<=1e9!如果a是1,会空跑1e9次!
if (a == 1) {
printf("%d\n", 1);
exit(0);
}
for (LL i = 1; i <= b; i++) {
res *= a;
if (res > 1e9) {
printf("%d\n", -1);
exit(0);
}
}
printf("%lld\n", res);
return 0;
}