代码

#include <stdio.h>

int main() {
	int n;
        int tmp,a,b;
	scanf("%d", &n);
	for (int i = 1; i <= n; i++) {
            scanf("%d%d", &a,&b);
            tmp=a,a=b,b=tmp;
	    return a + b;
	}
	return 0;
}

评测结果