#include<bits/stdc++.h>
#define ll long long
#define rep(i,l,r) for(int i(l),i##end(r);i<=i##end;++i)
#define per(i,r,l) for(int i(r),i##end(l);i>=i##end;--i)
using namespace std;
const int N=1e6+20; const ll mod=1e9+7;
ll fac[N]={1,1},ifac[N]={1,1},inv[N]={0,1};
int n; char s[N];
ll solve(){
    scanf("%s",s+1);
    return 0;
}
signed main(){
    rep(i,2,N-1){
        inv[i]=(mod-mod/i)*inv[mod%i]%mod;
        fac[i]=fac[i-1]*i%mod,ifac[i]=ifac[i-1]*inv[i]%mod;
    }
    int OP,T; scanf("%d%d",&OP,&T);
    while(T--) printf("%lld\n",solve());
    return 0;
}//g++ -g C.cpp -o my -std=c++14 -O2  -Wall -Wextra -Wshadow -Wconversion

本地能跑，但是交上去就死了 C++14 (GCC 9) O2

编译失败

Nothing is compiled: OUTPUT exceeds.