Submission #521740

#	Time	Username	Problem	Language	Result	Execution time	Memory
521740		A_D	Comparing Plants (IOI20_plants)	C++14	14 / 100	4014 ms	8728 KiB

plants

#include "plants.h"

#include <bits/stdc++.h>
using namespace std;
const int NN=2e5+100;
int a[NN];
int nn;

void init(int k,vector<int> r){
    nn=r.size();
    int cnt=nn;
    vector<int> vec;
    while(1){
        vec.clear();
        for(int i=0;i<nn;i++){
            if(r[i]==0){
                vec.push_back(i);
            }
        }
        if(vec.empty())break;
        reverse(vec.begin(),vec.end());
        vec.push_back(vec[0]);
        reverse(vec.begin(),vec.end());
        int j;
        int cn=0;
//        cout<<"vector\n";
  //      for(auto x:vec)cout<<x<<" ";cout<<endl;
        for(int i=1;i<vec.size();i++){
            if((vec[i]-vec[i-1]+nn)%nn+1>k){
                j=vec[i];
//                cout<<j<<" ";
                cn++;
            }
        }
   //     cout<<endl;
     //   cout<<cn<<endl;
       // cout<<j<<endl;
        if(cn>1)assert(0);
        if(vec.size()==2)j=vec[0];
        a[j]=cnt--;
        int h=k;
        while(h--){
            r[j]--;j--;j+=nn;j%=nn;
        }
//        for(int i=0;i<nn;i++)cout<<a[i]<<" ";cout<<endl;
  //      for(int i=0;i<nn;i++)cout<<r[i]<<" ";cout<<endl;
    }
}

int compare_plants(int x, int y){
	if(a[x]<a[y])return -1;
	else return 1;

}

Compilation message (stderr)

plants.cpp: In function 'void init(int, std::vector<int>)':
plants.cpp:28:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   28 |         for(int i=1;i<vec.size();i++){
      |                     ~^~~~~~~~~~~
plants.cpp:40:13: warning: 'j' may be used uninitialized in this function [-Wmaybe-uninitialized]
   40 |         a[j]=cnt--;
      |         ~~~~^~~~~~

• Subtask 1: 0 / 5
• Subtask 2: 14 / 14
• Subtask 3: 0 / 13
• Subtask 4: 0 / 17
• Subtask 5: 0 / 11
• Subtask 6: 0 / 15
• Subtask 7: 0 / 25