Submission #40691457

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Source Code Expand

#include <iostream>
#include <set>
#include <unordered_map>
#include <vector>
using namespace std;
int main() {
    int n;
    scanf("%d", &n);

    constexpr int CARD_MAX = 2e5;
    vector<multiset<int>> v1(n + 1);  // v1[i]:=箱iに入っているカード
    vector<set<int>> v2(CARD_MAX + 1);    //v2[i]:=数字iの書かれたカードが入っている箱のID

    int q;
    scanf("%d", &q);
    while (q--) {
        int t;
        scanf("%d", &t);
        if (t == 1) {
            int i,j;
            scanf("%d%d", &i, &j);
            v1[j].emplace(i);
            v2[i].emplace(j);
        } else if (t == 2) {
            int i;
            scanf("%d", &i);
            for (const auto& card : v1[i]) {
                printf("%d ", card);
            }
            printf("\n");
            
        } else {
            int i;
            scanf("%d", &i);
            for (const auto& box : v2[i]) {
                printf("%d ", box);
            }
            printf("\n");
        }
    }
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    8 |     scanf("%d", &n);
      |     ~~~~~^~~~~~~~~~
./Main.cpp:15:10: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   15 |     scanf("%d", &q);
      |     ~~~~~^~~~~~~~~~
./Main.cpp:18:14: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   18 |         scanf("%d", &t);
      |         ~~~~~^~~~~~~~~~
./Main.cpp:21:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   21 |             scanf("%d%d", &i, &j);
      |             ~~~~~^~~~~~~~~~~~~~~~
./Main.cpp:26:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   26 |             scanf("%d", &i);
      |             ~~~~~^~~~~~~~~~
./Main.cpp:34:18: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   34 |             scanf("%d", &i);
      |             ~~~~~^~~~~~~~~~

Judge Result