Submission #557546

#	Time	Username	Problem	Language	Result	Execution time	Memory
557546		600Mihnea	Food Court (JOI21_foodcourt)	C++17	2 / 100	1084 ms	17960 KiB

foodcourt

#include <bits/stdc++.h>

bool home = 1;

using namespace std;

typedef long long ll;
int n,m,q;

signed main() {
#ifdef ONLINE_JUDGE
  home = 0;
#endif

  home=0;

  if (home) {
    freopen("I_am_iron_man", "r", stdin);
  }
  else {
    ios::sync_with_stdio(0); cin.tie(0);
  }

  cin>>n>>m>>q;
  vector<vector<ll>> questions;
  vector<int> sol;

  for (int i=1;i<=q;i++) {
    int type;
    cin>>type;
    assert(1<=type&&type<=3);
    questions.push_back(vector<ll> (5-type));
    if(type==3)sol.push_back(-1);
    for (auto &qu:questions.back()) cin>>qu;
  }

  for(int i=1;i<=n;i++) {
    vector<pair<ll, int>> ev;
    int have=0;
    int jump=0;
    int id=-1;

    for (auto &question:questions) {
      int type=5-(int)question.size();
      assert(1<=type&&type<=3);
      id+=(type==3);
      if(type==1) {
        int l=question[0],r=question[1],group=question[2],k=question[3];
        if(l<=i&&i<=r) {
          have+=k;
          ev.push_back({have, group});
        }
      }
      if (type==2) {
        int l=question[0],r=question[1],k=question[2];
        if (l<=i&&i<=r) {
          jump=min(have,jump+k);
        }
      }
      if(type==3) {
        int a=question[0];
        ll b=question[1];
        if (a==i) {
          b+=jump;
          if (b>have) {
            sol[id]=0;
          }else{
            int low=0,high=(int) ev.size()-1,pz=-1;
            while (low<=high) {
              int mid=(low+high)/2;
              if(ev[mid].first>=b) {
                pz=mid;
                high=mid-1;
              }else{
                low=mid+1;
              }
            }
            assert(pz!=-1);
            sol[id]=ev[pz].second;
          }
        }
      }
    }
  }

  for (auto &x:sol) {
    cout<<x<<"\n";
  }
}

Compilation message (stderr)

foodcourt.cpp: In function 'int main()':
foodcourt.cpp:18:12: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     freopen("I_am_iron_man", "r", stdin);
      |     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 2 / 2
• Subtask 2: 0 / 5
• Subtask 3: 0 / 7
• Subtask 4: 0 / 21
• Subtask 5: 0 / 15
• Subtask 6: 0 / 13
• Subtask 7: 0 / 26
• Subtask 8: 0 / 11