Cod sursa(job #1365809)
Utilizator | Data | 28 februarie 2015 15:47:07 | |
---|---|---|---|
Problema | Litere | Scor | 40 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.52 kb |
#include <iostream>
#include <fstream>
using namespace std;
ifstream in("litere.in");
ofstream out("litere.out");
char T[10005];
int f[30];
int main()
{
int n;
in>>n;
in.getline(T,0);
in.getline(T,10000);
int v[n+1];
for(int i=0;i<n;i++)
v[i+1]=(int)(T[i]-'a');
long long nr=0;
for(int i=1;i<=n;i++)
{
int cnt=0;
for(int j=v[i]+1;j<= 'z'-'a';j++)
cnt=cnt+f[j];
nr=nr+cnt;
f[v[i]]++;
}
out<<nr;
return 0;
}