zoj3171

#include<stdio.h>#include<string.h>#include<iostream>using namespace std;char str[10005];int main(){    long long dp[5];    int n,i;    while(~scanf("%s",str))    {        memset(dp,0,sizeof(dp));        n=strlen(str);        for(i=0;i<n;i++)        {            char c=str[i];            if(c<=90)              c=c-'A'+'a';            switch(c)            {                case 's':dp[0]++;break;                case 'e':dp[1]+=dp[0];dp[3]+=dp[2];break;                case 'v':dp[2]+=dp[1];break;                case 'n':dp[4]+=dp[3];break;            }        }        printf("%lld\n",dp[4]);            }}