Submission #1022445

#	Time	Username	Problem	Language	Result	Execution time	Memory
1022445		edogawa_something	Fountain Parks (IOI21_parks)	C++17	15 / 100	173 ms	81852 KiB

parks

#include "parks.h"
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;
typedef vector<ll> vii;
typedef pair<ll,ll> pii;
#define pb push_back
#define F first 
#define S second 
#define all(v) v.begin(),v.end()
const ll M=2e6+50;
vii adj[M];
bool vis[M];
void dfs(ll x){
    if(vis[x])
    return;
    vis[x]=1;
    for(auto it:adj[x]){
        dfs(it);
    }
}
int construct_roads(std::vector<int> x, std::vector<int> y) {
    vector<pair<int,int>>f,m,b;
    for(int i=0;i<x.size();i++){
        if(x[i]==2){
            f.pb({y[i],i});
        }
        else
        b.pb({y[i],i});
    }
    sort(all(f)),sort(all(b));
    vector<int>e1,e2,ax,ay;
    for(int i=0;i<ll(f.size())-1;i++){
        if(f[i+1].F-f[i].F==2){
        e1.pb(f[i].S);
        e2.pb(f[i+1].S);
        ax.pb(1);
        ay.pb(f[i].F+1);
        }
    }
    for(int i=0;i<ll(b.size())-1;i++){
        if(b[i+1].F-b[i].F==2){
        e1.pb(b[i].S);
        e2.pb(b[i+1].S);
        ax.pb(5);
        ay.pb(b[i].F+1);
        }
    }
    ll i=0,j=0;
    while(1){
        if(i==f.size()||j==b.size())
        break;
        if(f[i].F==b[j].F){
            e1.pb(f[i].S),e2.pb(b[j].S);
            ax.pb(3),ay.pb(f[i].F-1);
            i++,j++;
        }
        else if(f[i].F<b[j].F){
            i++;
        }
        else if(b[j].F<f[i].F){
            j++;
        }
    }
    for(int i=0;i<e1.size();i++)
    adj[e1[i]].pb(e2[i]),adj[e2[i]].pb(e1[i]);
    dfs(0);
    for(int i=0;i<x.size();i++){
        if(!vis[i])
        return 0;
    }
    build(e1,e2,ax,ay);
    return 1;
}

Compilation message (stderr)

parks.cpp: In function 'int construct_roads(std::vector<int>, std::vector<int>)':
parks.cpp:24:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i=0;i<x.size();i++){
      |                 ~^~~~~~~~~
parks.cpp:51:13: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         if(i==f.size()||j==b.size())
      |            ~^~~~~~~~~~
parks.cpp:51:26: warning: comparison of integer expressions of different signedness: 'll' {aka 'long long int'} and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   51 |         if(i==f.size()||j==b.size())
      |                         ~^~~~~~~~~~
parks.cpp:65:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   65 |     for(int i=0;i<e1.size();i++)
      |                 ~^~~~~~~~~~
parks.cpp:68:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   68 |     for(int i=0;i<x.size();i++){
      |                 ~^~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 10 / 10
• Subtask 3: 0 / 15
• Subtask 4: 0 / 20
• Subtask 5: 0 / 20
• Subtask 6: 0 / 30