Submission #45715

#	Time	Username	Problem	Language	Result	Execution time	Memory
45715		mirbek01	Jakarta Skyscrapers (APIO15_skyscraper)	C++17	10 / 100	3 ms	832 KiB

skyscraper

# include <bits/stdc++.h>

using namespace std;

const int N = 30005;

int n, m, b[N], p[N], a[N], c[N], ans = 1e9;

int main(){
      cin >> n >> m;

      for(int i = 0; i < n; i ++)
            a[i] = c[i] = 1e9;

      for(int i = 1; i <= m; i ++){
            cin >> b[i] >> p[i];
      }

      if(n > 10 || m > 3) return 0;
      a[b[1]] = 0;
      for(int i = b[1]; i + p[1] < n; i += p[1]){
            a[i + p[1]] = a[i] + 1;
      }
      for(int i = b[1]; i - p[1] >= 0; i -= p[1]){
            a[i - p[1]] = a[i] + 1;
      }
      if(m > 2){
            c[b[3]] = 0;
            for(int i = b[3]; i + p[3] < n; i += p[3]){
                  c[i + p[3]] = c[i] + 1;
            }
            for(int i = b[3]; i - p[3] >= 0; i -= p[3]){
                  c[i - p[3]] = c[i] + 1;
            }
      }

      ans = a[b[2]];

      if(m > 2)
            if(c[b[2]] && a[b[3]]){
                  ans = min(ans, a[b[3]] + c[b[2]]);
            }

      if(ans == 1e9)
            cout << -1 << endl;
      else
            cout << ans << endl;
}

• Subtask 1: 10 / 10
• Subtask 2: 0 / 12
• Subtask 3: 0 / 14
• Subtask 4: 0 / 21
• Subtask 5: 0 / 43