Submission #3826539

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Source Code Expand

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

const int N = 2e5 + 10;

int cnt[26];
char s[N];

int main(){
	int n;
	long long ans;
	scanf("%s", s + 1);
	n = strlen(s + 1);
	memset(cnt, 0, sizeof(cnt));
	for (int i = 1; i <= n; i++) cnt[s[i] - 'a']++;
	ans = 1LL * n * (n - 1) / 2;
	for (int i = 0; i < 26; i++) ans -= cnt[i] * (cnt[i] - 1) / 2;
	ans++;
	printf("%lld\n", ans);
	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:12:20: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", s + 1);
                    ^

Judge Result