Submission #1237491

#	Time	Username	Problem	Language	Result	Execution time	Memory
1237491		Irate	Art Collections (BOI22_art)	C++20	Compilation error	0 ms	0 KiB

art

#include<bits/stdc++.h>
#include "art.h"
using namespace std;
const int mxN = 4005;
vector<int>ANS, pos;
int n, QUERY = 0, hist[mxN][mxN];
int publish(vector<int>R);
// {
//     QUERY++;
//     int I = 0;
//     for(int i = 0;i < n;++i){
//         for(int j = i + 1;j < n;++j){
//             I += (pos[R[i]] > pos[R[j]]);
//         }
//     }
//     return I;
// }
void answer(vector<int>R);
// {
//     for(int i = 0;i < n;++i){
//         if(R[i] != ANS[i]){
//             cout << "ERRRR" << endl;
//             return;
//         }
//     }
// }
bool cmp(int a, int b){
    if(hist[a][b] != -1)return hist[a][b];
    vector<int>temp;
    for(int i = 1;i <= n;++i){
        if(i == a || i == b)continue;
        temp.push_back(i);
    }
    temp.push_back(a);
    temp.push_back(b);
    int I = publish(temp);
    swap(temp[n - 2], temp[n - 1]);
    int D = I - publish(temp);
    int ans = !(D > 0);
    hist[a][b] = ans;
    hist[b][a] = !ans;
    if(D > 0)return ans;
    return ans;
}
vector<int>gen(int n){
    vector<int>perm(n);
    for(int i = 1;i <= n;++i){
        perm[i - 1] = i;
    }
    for(int i = 0;i < 100;++i){
        int a = rand() % n;
        int b = rand() % n;
        swap(perm[a], perm[b]);
    }
    return perm;
}
int main(){
    srand(time(0));
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n;
    ANS = gen(n);
    pos.resize(n + 1);
    for(int i = 0;i < mxN;++i){
        for(int j = 0;j < mxN;++j){
            hist[i][j] = -1;
        }
    }
    for(int i = 0;i < n;++i){
        pos[ANS[i]] = i;
    }
    vector<int>v(n);
    for(int i = 1;i <= n;++i){
        v[i - 1] = i;
    }
    sort(v.begin(), v.end(), cmp);
    answer(v);
    // cout << '\n';
    // cout << QUERY << '\n';
}

Compilation message (stderr)

/usr/bin/ld: /tmp/ccMgTMjJ.o: in function `main':
interface.cpp:(.text.startup+0x0): multiple definition of `main'; /tmp/ccviRZbk.o:art.cpp:(.text.startup+0x0): first defined here
/usr/bin/ld: /tmp/ccMgTMjJ.o: in function `main':
interface.cpp:(.text.startup+0x16): undefined reference to `solve(int)'
collect2: error: ld returned 1 exit status