http://www.codeforces.com/contest/231/problem/A

PetyaVasyaTonya.c

#include<stdio.h>

int main(){

int numberOfProblems, problemThatCanBeSolved = 0, countOfPeople;
char line[1024];
char * str;

scanf("%d",&numberOfProblems);

while(numberOfProblems--){
        countOfPeople = 0;
        fflush(stdin);
        gets(line);
        str = strtok(line," \r\n\t\0");
        while(str!=NULL)
            {
                countOfPeople += atoi(str);
                if(countOfPeople >=2){
                    problemThatCanBeSolved++;
                    break;
                }
                str=strtok(NULL," \r\t\n\0");
            }
}

printf("%d\n",problemThatCanBeSolved);
return 0;

}