sicily 1342

dp

#include <iostream>#include <cmath>#include <cstring>using namespace std;int N, m;int data[30000];int main() { while(cin >> N >> m) { int ans = 0; int cost, pro; memset(data, 0, sizeof(data)); for(int i = 0; i < m; i++) { cin >> cost >> pro; for(int j = N; j >= cost; j--) { if(data[j] < data[j - cost] + cost * pro) { data[j] = data[j - cost] + + cost * pro; ans = max(data[j], ans); } } } cout << ans << endl; } return 0;}