Cod sursa(job #1430171)
Utilizator | Data | 7 mai 2015 22:54:24 | |
---|---|---|---|
Problema | Litere | Scor | 0 |
Compilator | cpp | Status | done |
Runda | Arhiva de probleme | Marime | 0.4 kb |
#include <cstdio>
using namespace std;
char v[100002];
int f[27];
int main()
{
FILE *in, *out;
in = fopen("litere.in","r");
out = fopen("litere.out","w");
int l, i, j, op=0;
fscanf(in,"%d\n",&l);
fgets(v,100002,in);
for(i=0;i<l;++i)
{
for(j=v[i]-'a'+1;j<27;++j)op+=f[j];
++f[v[i]-'a'];
}
fprintf(out,"%d\n",op);
return 0;