提出 #29504566

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ソースコード 拡げる

#include<cstdio>
#include<unordered_map>
using namespace std;
int main()
{
	int n;
	scanf("%d", &n);
	unordered_map<int, bool> a;
	for (int i = 1; i <= n; ++i)
	{
		int x;
		scanf("%d", &x);
		a[x] = 1;
	}
	printf("%zd", a.size());
	return 0;
}

提出情報

コンパイルエラー

./Main.cpp: In function ‘int main()’:
./Main.cpp:7:7: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
    7 |  scanf("%d", &n);
      |  ~~~~~^~~~~~~~~~
./Main.cpp:12:8: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
   12 |   scanf("%d", &x);
      |   ~~~~~^~~~~~~~~~

ジャッジ結果