Submission #65923876

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Source Code Expand

#include <stdio.h>

int main(void){
    int H, W, N;
    scanf("%d %d %d", &H, &W, &N);

    int X[N], Y[N];
    for(int i = 0; i < N; i++){
        scanf("%d %d", &X[i], &Y[i]);  // 1 ≤ X[i] ≤ H, 1 ≤ Y[i] ≤ W
    }

    // 1〜H,1〜W で直接インデックスできるように VLA を 1 大きく取る
    int MAP[H+1][W+1];
    for(int i = 1; i <= H; i++){
        for(int j = 1; j <= W; j++){
            MAP[i][j] = 0;
        }
    }
    // ゴミをマーク
    for(int i = 0; i < N; i++){
        MAP[X[i]][Y[i]] = 1;
    }

    int Q;
    scanf("%d", &Q);
    while(Q--){
        int axis, idx;
        scanf("%d %d", &axis, &idx);

        int garbage = 0;
        if(axis == 1){
            // 行 idx のゴミを数えて捨てる
            for(int j = 1; j <= W; j++){
                garbage += MAP[idx][j];
                MAP[idx][j] = 0;
            }
        } else {
            // 列 idx のゴミを数えて捨てる
            for(int i = 1; i <= H; i++){
                garbage += MAP[i][idx];
                MAP[i][idx] = 0;
            }
        }
        printf("%d\n", garbage);
    }

    return 0;
}

Submission Info

Compile Error

Main.c: In function ‘main’:
Main.c:5:5: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    5 |     scanf("%d %d %d", &H, &W, &N);
      |     ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.c:9:9: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
    9 |         scanf("%d %d", &X[i], &Y[i]);  // 1 ≤ X[i] ≤ H, 1 ≤ Y[i] ≤ W
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~~
Main.c:25:5: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   25 |     scanf("%d", &Q);
      |     ^~~~~~~~~~~~~~~
Main.c:28:9: warning: ignoring return value of ‘scanf’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
   28 |         scanf("%d %d", &axis, &idx);
      |         ^~~~~~~~~~~~~~~~~~~~~~~~~~~

Judge Result