Submission #65891658

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Source Code Expand

#include <stdio.h>
#include <stdlib.h>

int main(void){
    int N, K;
    if (scanf("%d %d", &N, &K) != 2) return 1;

    long long *A = malloc(sizeof(long long) * N);
    if (!A) return 1;
    for(int i = 0; i < N; i++){
        scanf("%lld", &A[i]);
    }

    // 10^K をループで安全に計算
    unsigned long long limit = 1;
    for(int i = 0; i < K; i++){
        limit *= 10ULL;
    }

    // now は表示中の値
    unsigned long long now = 1;

    for(int i = 0; i < N; i++){
        __int128 prod = (__int128)now * (__int128)A[i];
        if (prod >= (__int128)limit) {
            now = 1;
        } else {
            now = (unsigned long long)prod;
        }
    }

    printf("%llu\n", now);
    free(A);
    return 0;
}

Submission Info

Compile Error

Main.c: In function ‘main’:
Main.c:11:9: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   11 |         scanf("%lld", &A[i]);
      |         ^~~~~~~~~~~~~~~~~~~~

Judge Result