oj.uz

Submission #1038241

# Submission time Handle Problem Language Result Execution time Memory
1038241 2024-07-29T14:42:23 Z aymanrs Longest Trip (IOI23_longesttrip) C++17
15 / 100
 24 ms 956 KB 
#include "longesttrip.h"
#include <bits/stdc++.h>
#pragma GCC optimize("O3,unroll-loops")
#pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
using namespace std;
int g[257][257] = {{0}};
bool isg(int a, int b){
    if(g[a][b]) {
        return g[a][b] == 1;
    }
    if(are_connected({a},{b})){
        g[a][b]=g[b][a]=1;
        return true;
    }
    g[a][b]=g[b][a]=-1;
    return false;
}
bool arc(const vector<int>& a, const vector<int>& b){
    if(a.empty()||b.empty()) return false;
    bool at0=false;
    for(int i : a) for(int j : b) {
        if(g[i][j]==1) return true;
        else if(!g[i][j]) at0=true;
    }
    if(!at0) return false;
    return are_connected(a, b);
}
pair<vector<int>,vector<int>> fl(const vector<int>& V){
    if(V.size()<=1) return {V, {}};
    int i, j;
    vector<int> a;a.push_back(V[0]);
    for(i = 1;i < V.size();i++){
        if(isg(a.back(), V[i])){
            a.push_back(V[i]);
        } else {
            i = V[i];
            j = a.back();
            break;
        }
    }
    if(a.size() == V.size()) return {a, {}};
    vector<int> b, c;
    a.clear();
    for(int k : V){
        if(k==i||k==j) continue;
        if(!isg(k,j)) a.push_back(k);
        else if(!isg(k,i)) c.push_back(k);
        else {
            b.push_back(k);
        }
    }
    if(b.empty()){
        if(!arc(a,c)) {
            a.push_back(i);
            c.push_back(j);
            return {a,c};
        }
        int l=0,r=c.size()-1, ll=0,rr=a.size()-1;
        while(l<r||ll<rr){
            if(r-l > rr-ll){
                int m = r+l>>1;
                if(arc(vector<int>{c.begin()+l,c.begin()+m+1}, vector<int>{a.begin()+ll,a.begin()+rr+1})){
                    r=m;
                } else l = m+1;
            } else {
                int m = ll+rr>>1;
                if(arc(vector<int>{c.begin()+l,c.begin()+r+1}, vector<int>{a.begin()+ll,a.begin()+m+1})){
                    rr=m;
                } else ll = m+1;
            }
        }
        a.push_back(i);swap(a[ll], a.back());
        c.push_back(j);swap(c[l], c[0]);
        for(int k : c) a.push_back(k);
    }
    auto L = fl(b);
    if(L.second.empty()){
        a.push_back(i);
        for(int k : L.first) a.push_back(k);
        a.push_back(j);
        for(int k : c) a.push_back(k);
        return {a, {}};
    } else {
        if(a.empty()){
            L.first.push_back(i);
            for(int k : L.second) L.first.push_back(k);
            L.first.push_back(j);
            for(int k : c) L.first.push_back(k);
            return {L.first, {}};
        }
        if(isg(a[0], L.first[0])){
            a.push_back(i);
            swap(a.back(), a[0]);
            for(int k : L.first) a.push_back(k);
            for(int k : a) L.second.push_back(k);
            L.second.push_back(j);
            for(int k : c) L.second.push_back(k);
            return {L.second, {}};
        } else {
            a.push_back(i);
            swap(a.back(), a[0]);
            for(int k : L.second) a.push_back(k);
            for(int k : a) L.first.push_back(k);
            L.first.push_back(j);
            for(int k : c) L.first.push_back(k);
            return {L.first, {}};
        }
    }

}
std::vector<int> longest_trip(int N, int D)
{
    vector<int> V;
    for(int i = 0;i < N;i++) {
        V.push_back(i);
        for(int j = 0;j < N;j++) g[i][j] = 0;
    }
    auto L = fl(V);
    if(L.first.size()>=L.second.size()) return L.first;
    return L.second;
}

Compilation message

longesttrip.cpp: In function 'std::pair<std::vector<int>, std::vector<int> > fl(const std::vector<int>&)':
longesttrip.cpp:32:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   32 |     for(i = 1;i < V.size();i++){
      |               ~~^~~~~~~~~~
longesttrip.cpp:61:26: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   61 |                 int m = r+l>>1;
      |                         ~^~
longesttrip.cpp:66:27: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   66 |                 int m = ll+rr>>1;
      |                         ~~^~~

Subtask #0
0.0 / 0.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 344 KB Output is correct
2 Correct 8 ms 956 KB Output is correct

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 7 ms 344 KB Output is correct
3 Correct 6 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 6 ms 600 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 6 ms 344 KB Output is correct
2 Correct 4 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 5 ms 344 KB Output is correct
5 Correct 6 ms 852 KB Output is correct
6 Correct 6 ms 344 KB Output is correct
7 Correct 13 ms 344 KB Output is correct
8 Correct 17 ms 496 KB Output is correct
9 Correct 15 ms 344 KB Output is correct
10 Correct 15 ms 600 KB Output is correct
11 Correct 13 ms 600 KB Output is correct
12 Correct 24 ms 600 KB Output is correct
13 Correct 24 ms 600 KB Output is correct

Subtask #3
0.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 5 ms 344 KB Output is correct
2 Correct 6 ms 344 KB Output is correct
3 Correct 6 ms 344 KB Output is correct
4 Correct 7 ms 580 KB Output is correct
5 Correct 6 ms 600 KB Output is correct
6 Correct 8 ms 344 KB Output is correct
7 Correct 14 ms 344 KB Output is correct
8 Correct 18 ms 760 KB Output is correct
9 Correct 11 ms 344 KB Output is correct
10 Correct 10 ms 600 KB Output is correct
11 Correct 9 ms 600 KB Output is correct
12 Correct 20 ms 600 KB Output is correct
13 Correct 20 ms 600 KB Output is correct
14 Correct 7 ms 344 KB Output is correct
15 Correct 7 ms 344 KB Output is correct
16 Incorrect 6 ms 344 KB Incorrect
17 Halted 0 ms 0 KB -

Subtask #4
0.0 / 60.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 344 KB Output is correct
2 Correct 7 ms 344 KB Output is correct
3 Correct 5 ms 344 KB Output is correct
4 Correct 6 ms 344 KB Output is correct
5 Correct 5 ms 600 KB Output is correct
6 Correct 5 ms 344 KB Output is correct
7 Correct 11 ms 344 KB Output is correct
8 Correct 15 ms 344 KB Output is correct
9 Partially correct 10 ms 344 KB Output is partially correct
10 Partially correct 11 ms 696 KB Output is partially correct
11 Partially correct 15 ms 704 KB Output is partially correct
12 Partially correct 17 ms 600 KB Output is partially correct
13 Partially correct 22 ms 600 KB Output is partially correct
14 Correct 8 ms 344 KB Output is correct
15 Correct 6 ms 344 KB Output is correct
16 Incorrect 8 ms 344 KB Incorrect
17 Halted 0 ms 0 KB -