Wow! Such Doge! - HDU 4847 （水题）

#include<stdio.h>
#include<string.h>
#include<algorithm>
using namespace std;

const int MAXN = 1e6+7;
const int oo = 1e9+37;

char s[MAXN];

int main()
{
int ans = 0;

while(scanf("%s", s) != EOF)
{
for(int i=0; s[i]; i++)
{
if(s[i] >= 'A' && s[i] <= 'Z')
s[i] = s[i] - 'A' + 'a';
}

char *p = s;

while(p=strstr(p, "doge"), p != NULL)
ans++, p+=4;
}

printf("%d\n", ans);

return 0;
}