提出 #14587866

---

ソースコード 拡げる

#include <bits/stdc++.h>
using namespace std;

int main() {
	int n, arr[100005];
	long long sum = 0;
	map<int, int> mps;
	scanf("%d", &n);
	for(int i = 0;i < n;i++){
		scanf("%d", &arr[i]);
		mps[arr[i]]++;
		sum += arr[i];
	}
	int q;
	scanf("%d", &q);
	while(q--){
		int b, c;
		scanf("%d %d", &b, &c);
		if(!mps[b]){
			printf("%lld\n", sum);
			continue;
		}
		int x = mps[b];
		sum -= (x * b);
		sum += (x * c);
		mps[c] += x;
		mps[b] = 0;
		printf("%lld\n", sum);
	}
	
	return 0; 
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    8 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
./Main.cpp:10:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   10 |   scanf("%d", &arr[i]);
      |   ~~~~~^~~~~~~~~~~~~~~
./Main.cpp:15:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   15 |  scanf("%d", &q);
      |  ~~~~~^~~~~~~~~~
./Main.cpp:18:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   18 |   scanf("%d %d", &b, &c);
      |   ~~~~~^~~~~~~~~~~~~~~~~

ジャッジ結果