25304 영수증

[Rohyoohyun]

include

int main(){ int n, m, price, cnt; scanf("%d", &n); scanf("%d", &m);

int sum=0;
for(int i=0; i<m; i++){
    scanf("%d %d", &price, &cnt);
    sum += price*cnt;
}

if(n == sum) printf("Yes");
else printf("No");

return 0;

}