Submission #1540382

---

Source Code Expand

#include<cstdio>
#include<cmath>
#include<cstring>
#include<algorithm>
#include<map>
#include<vector>
using namespace std;

int main() {
	char A[200001];
	long long cnt[26], len;
	long long ans;
	scanf("%s", A);
	len = strlen(A);
	for (int i = 0; i < 26; i++) {
		cnt[i] = 0;
	}
	for (int i = 0; i < len; i++) {
		cnt[A[i] - 'a']++;
	}

	ans = 1;
	for (int i = 0; i < 26; i++) {
		for (int j = i + 1; j < 26; j++) {
			ans = ans + cnt[i] * cnt[j];
		}
	}
	
	printf("%lld\n", ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:13:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", A);
                ^

Judge Result