Submission #1256675

#	Time	Username	Problem	Language	Result	Execution time	Memory
1256675		medmdg	Souvenirs (IOI25_souvenirs)	C++20	22 / 100	1 ms	412 KiB

souvenirs

#include "souvenirs.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;


void sub1(int N, long long P0) {
  pair<vector<int>, long long> res = transaction(P0-1);
}
void sub2(int N, ll P0){
  for(int i=N-1;i>0;i--){
    for(int j=N;j>i;j--){
      transaction(i);
    }
  }
}
void sub3(int N,ll P0){
  vector<ll> rem(N);
  for(int i=0;i<N;i++){
    rem[i]=i;
  }
  ll cost=P0-1;
  for(int i=1;i<N;i++){
    pair<vector<int>, long long> res =transaction(cost);
    for(auto x:res.first)rem[x]--;
    if(res.first.size()>1||res.second)cost--;
    while(rem[i]){
      res=transaction(cost);
      for(auto x:res.first)rem[x]--;
    }
    cost--;
  }
}
void sub4(int N, long long P0) {
  pair<vector<int>, long long> res = transaction(P0-1);
  ll cost=P0-1-res.second;
  //cout<<"#"<<cost<<endl;
  if(res.first.size()>1)
  transaction(cost/2);
  else{
  transaction(cost-1);
  transaction(cost-1);
  }
}
pair<vector<int>, long long> ask(ll cost,vector<ll> &v){
  pair<vector<int>, long long> res = transaction(cost);
  for(auto x:res.first)v[x]--;
  return res;
}
void sub5(int N,ll P0){
  vector<ll> rem(N);
  for(int i=0;i<N;i++){
    rem[i]=i;
  }
  vector<ll> costs(N,0);
  costs[0]=P0;

  pair<vector<int>, long long> res;
  ll cost=P0;
  while(1){
    cost/=2;
    pair<vector<int>, long long> res=ask(cost,rem);
    if(res.first.size()==1 && res.first[0]==N-2){
      cost-=1+res.second;
      cost*=2;
    }
    if(res.first[0]==N-1){
      cost-=res.second;
      costs.back()=cost;
      break;
    }
  }
  for(int i=N-2;rem[i];i--){
    cost*=2;
    pair<vector<int>, long long> res=ask(cost,rem);
    for(auto x:res.first)cost-=costs[x];
    cost-=res.second;
    costs[i]=cost;
  }
  for(int i=0;i<N;i++){
    while(rem[i]>0){
      rem[i]--;
      transaction(costs[i]);
    }
  }/*
  for(int i=0;i<N;i++){
    cout<<costs[i]<<" ";
  }
  cout<<endl;*/
}
void buy_souvenirs(int N, long long P0) {
  if(N==3)sub4(N,P0);
  else if(N==2) sub1(N,P0);
  else sub5(N,P0);
  return;
}

• Subtask 0: 0 / 0
• Subtask 1: 4 / 4
• Subtask 2: 0 / 3
• Subtask 3: 0 / 14
• Subtask 4: 18 / 18
• Subtask 5: 0 / 28
• Subtask 6: 0 / 33