Submission #388728

#	Time	Username	Problem	Language	Result	Execution time	Memory
388728		victoriad	Fountain (eJOI20_fountain)	C++14	30 / 100	545 ms	524292 KiB

fountain

#include <cmath>
#include <cstdio>
#include <vector>
#include <iostream>
#include <algorithm>
#include <utility>
#include <queue>
#include <map>
#include <iomanip>
#include <stack>
#include <fstream>
using namespace std;
 
int search(int l,vector<pair<long long int,int> >&v){
int low=0,hi=v.size(),r=-1,mid;
while(low<=hi){
  mid=low+(hi-low)/2;
  if(v[mid].first>=l){
    r=v[mid].second;
    hi=mid-1;
  }
  else{
    low=mid+1;
  }
}
if(r==-1)return 0;
else return r+1;
}
 void grupos(int nodo,vector<long long int>&d,vector<vector<pair<long long int, int> > >& c, vector<long long int>& v){
   int max=d[nodo];
   long long int x=0;
   vector<pair<long long int,int> >a;
   for(int i=nodo+1;i<d.size();i++){
     if(d[i]>max){
       max=d[i];
       x+=v[i];
       a.push_back(make_pair(x,i));
     }
   }
   c[nodo]=a;
 }
int main(){
  ios::sync_with_stdio(false);
   cin.tie(NULL);
    int n,q;
    cin>>n>>q;
    int vo,r,l;
    vector<long long int>v(n);
    vector<long long int>d(n);
    cin>>d[0]>>v[0];
    for(int i=1;i<n;i++){
      cin>>d[i]>>v[i];
    }
    vector<vector<pair<long long int, int> > >c(n);
    vector<bool>p(n,false);
    for(int i=0;i<n;i++){
        grupos(i,d,c,v);
     }
    
    for(int i=0;i<q;i++){
      cin>>r>>l;
      r--;
      l-=v[r];
      if(l<=0)cout<<r+1<<"\n";
      else{
        if(c[r].size()==0)cout<<0<<"\n";
        else
        cout<<search(l,c[r])<<"\n";
      }
    }
  return 0;
}

Compilation message (stderr)

fountain.cpp: In function 'void grupos(int, std::vector<long long int>&, std::vector<std::vector<std::pair<long long int, int> > >&, std::vector<long long int>&)':
fountain.cpp:33:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   33 |    for(int i=nodo+1;i<d.size();i++){
      |                     ~^~~~~~~~~
fountain.cpp: In function 'int main()':
fountain.cpp:47:9: warning: unused variable 'vo' [-Wunused-variable]
   47 |     int vo,r,l;
      |         ^~

• Subtask 1: 30 / 30
• Subtask 2: 0 / 30
• Subtask 3: 0 / 40