oj.uz

Submission #916068

# Submission time Handle Problem Language Result Execution time Memory
916068 2024-01-25T08:32:58 Z chirathnirodha Longest Trip (IOI23_longesttrip) C++17
5 / 100
 3 ms 344 KB 
#include "longesttrip.h"
#include<bits/stdc++.h>
using namespace std;
#define PB push_back
#define MP make_pair
#define P push
#define I insert 
#define F first
#define S second
typedef long long ll;

vector<int> longest_trip(int n, int D){
    if(D==3){
        vector<int> tt;for(int i=0;i<n;i++)tt.PB(i);
        return tt;
    }
    vector<int> v[n];
    bool grid[n][n];
    for(int i=0;i<n;i++)v[i].clear();
    memset(grid,0,sizeof(grid));

    for(int i=0;i<n;i++){
        for(int j=i+1;j<n;j++){
            if(are_connected({i},{j})){v[i].PB(j);v[j].PB(i); grid[i][j]=grid[j][i]=1;}
        }
    }
    vector<int> v1,v2;
    v1.PB(0);v2.PB(1);
    for(int i=2;i<n;i++){
        if(grid[i][v1.back()])v1.PB(i);
        else if(grid[i][v2.back()])v2.PB(i);
        else{
            for(int j=v2.size()-1;j>=0;j--)v1.PB(v2[j]);
            v2.clear();
            v2.PB(i);
        }
    }
    int ans=v1.size();
    pair<int,int> p1={0,v1.size()-1},p2={0,0};
    if(v2.size()>0){
        ans=v2.size();
        p1={0,0};p2={0,v2.size()-1};
    }
    for(int i=0;i<v1.size();i++){
        int x=v1[i];
        for(int j=0;j<v2.size();j++){
            int y=v2[j];
            if(!grid[x][y])continue;
            int cur;
            cur= i+1 + j+1 ;if(cur>ans){ans=cur;p1={0,i};p2={j,0};}
            cur= i+1 + v2.size()-j ;if(cur>ans){ans=cur;p1={0,i};p2={j,v2.size()-1};}
            cur= v1.size()-i + j+1 ;if(cur>ans){ans=cur;p1={v1.size()-1,i};p2={j,0};}
            cur= v1.size()-i + v2.size()-j ;if(cur>ans){ans=cur;p1={v1.size()-1,i};p2={j,v2.size()-1};}
        }
    }
    vector<int> ou;
    for(int i=p1.F;i<=p1.S;i++)ou.PB(v1[i]);
    for(int i=p2.F;i<=p2.S;i++)ou.PB(v2[i]);
    return ou;
}

Compilation message

longesttrip.cpp: In function 'std::vector<int> longest_trip(int, int)':
longesttrip.cpp:44:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   44 |     for(int i=0;i<v1.size();i++){
      |                 ~^~~~~~~~~~
longesttrip.cpp:46:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   46 |         for(int j=0;j<v2.size();j++){
      |                     ~^~~~~~~~~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 344 KB Output is correct
2 Correct 1 ms 344 KB Output is correct
3 Correct 1 ms 344 KB Output is correct
4 Correct 1 ms 344 KB Output is correct
5 Correct 0 ms 344 KB Output is correct

Subtask #2
0.0 / 10.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Incorrect 1 ms 340 KB Incorrect
2 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Incorrect 0 ms 344 KB Incorrect
2 Halted 0 ms 0 KB -