#include #include #include #include #include #include #include using namespace std; typedef long long ll; int G[1001], D[1001], ex[1001]; int tar = 3000000; int main() { int N; cin >> N; int curMax = 0; for(int i=0; i> G[i] >> D[i]; ex[i] = G[i] - 30000*D[i]; if(ex[i] > curMax) curMax = ex[i]; } if (curMax * 6 < tar){ cout << "NO" << endl; }else{ cout << "YES" << endl; vector idx; for(int i=0; i