Submission #1540582

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Source Code Expand

#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<algorithm>
#include<vector>
#include<queue>
using namespace std;
int main(void){
	char a[200010];
	int b[100];
	int c, d;
	int k;
	int n, m;
	int s, t;
	long long w,x, y, z;
	long long ans;
	for (int i = 0; i < 200010; i++)a[i] = 0;
	for (int i = 0; i < 100; i++)b[i] = 0;
	scanf("%s", a);
	x = strlen(a);
	for (long long i = 0; i < x;i++){
		b[a[i] - 97]++;
	}
	ans = x*(x - 1);
	ans = ans / 2;
	for (int i = 0; i < 26; i++){
		x = b[i] * (b[i] - 1);
		x = x / 2;
		ans = ans - x;
	}
	ans++;
	printf("%lld\n", ans);


	return 0;
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:19:16: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s", a);
                ^

Judge Result