【题外话：我......不补了......】
2015 ICL, Finals, Div. 2：http://codeforces.com/gym/100637
(strstr函数真好用......)
代码：
1 #include<bits/stdc++.h> 2 using namespace std; 3 char s[101]; 4 int main() { 5 int n, i; 6 scanf("%d ", &n); 7 int x = 0, y = 0, z = 0;//地球人，外星人，其他人 8 for(i = 1; i <= n; ++i) { 9 gets(s); 10 if(strstr(s, "blue") && strstr(s, "black")) x++; 11 else if(strstr(s, "white") && strstr(s, "gold")) y++; 12 else z++; 13 } 14 printf("%.10f\n", x*100.0/(x+y+z)); 15 printf("%.10f\n", y*100.0/(x+y+z)); 16 printf("%.10f\n", z*100.0/(x+y+z)); 17 return 0; 18 }