Submission #1541112

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Source Code Expand

#include<cstdio>
#include<cstring>
using namespace std;
long long l,ans,sum[200001]['z'+1];
char s[200001];
int main()
{
	scanf("%s",s);
	l=strlen(s);
	for (int i=l-1;i;i--)
		for (char j='a';j<='z';j++)sum[i][j]=sum[i+1][j]+(s[i]==j);
	for (int i=0;i<l;i++)ans+=l-1-i-sum[i+1][s[i]];
	printf("%lld\n",++ans);
}

Submission Info

Compile Error

./Main.cpp: In function ‘int main()’:
./Main.cpp:8:15: warning: ignoring return value of ‘int scanf(const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result]
  scanf("%s",s);
               ^

Judge Result