Submission #1540783

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Source Code Expand

#include <cstdio>
#include <algorithm>
#include <cstring>
using namespace std;
#pragma warning (disable : 4996)

char s[200001];
int c[30];

int main()
{
	scanf("%s", s + 1);
	int n = strlen(s + 1);
	long long ans = 1ll + (long long)n*(n - 1) / 2;
	for (int i = 1; i <= n; i++) c[s[i] - 'a']++;
	for (int i = 0; i < 26; i++)
		ans -= (long long)c[i] * (c[i] - 1) / 2;
	printf("%lld", 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