C :

int main() {
        int n, score, i;
        for (i = 1;i <= 50;i++) {
                scanf("%d %d", &n, &score);
                if (score >= 80)
                        printf("%d %d\n", n, score);
        }
        return 0;
}

C++ :

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


int main(int argc, char* argv[])
{  
	//freopen("test.txt","r",stdin);
	int num,score;
	while(scanf("%d %d",&num,&score)!=EOF){
		if(score>=0&&score<=100){
		if(score>=80)
			printf("%d %d\n",num,score);}
		else 
			break;
	}
	//fclose(stdin);
	return 0;
}