Submission #581195

#	Time	Username	Problem	Language	Result	Execution time	Memory
581195		alontanay	The Collection Game (BOI21_swaps)	C++14	0 / 100	1 ms	336 KiB

swaps

//
// --- Sample implementation for the task swaps ---
//
// To compile this program with the sample grader, place:
//     swaps.h swaps_sample.cpp sample_grader.cpp
// in a single folder and run:
//     g++ swaps_sample.cpp sample_grader.cpp
// in this folder.
//
#include "swaps.h"
#include <bits/stdc++.h>
#define f first
#define s second

using namespace std;
using pi = pair<int,int>;

void solve(int N, int V) {
    vector<vector<int>> lw(N,vector<int>(N,-1));
    for(int st = 0; st < N; st ++) {
        vector<int> res;
        int idx;
        vector<pi> ss;
        for(int l = 0; l < N/2; l ++) {
            int i = (st + l)%N;
            int j = (st + N - 1 - l)%N;
            if(i > j) { swap(i,j); }
            ss.push_back({i,j});
        }
        for(pi p : ss) {
            schedule(p.f+1,p.s+1);
        }
        res = visit();
        idx = 0;
        for(pi p : ss) {
            lw[p.f][p.s] = res[idx];
            lw[p.f][p.s] = 1 - res[idx];
            idx ++;
        }
        ss.clear();
        for(int l = 0; l < (N-1)/2; l ++) {
            int i = (st + l)%N;
            int j = (st + N - 2 - l)%N;
            if(i > j) { swap(i,j); }
            ss.push_back({i,j});
        }
        for(pi p : ss) {
            schedule(p.f+1,p.s+1);
        }
        res = visit();
        idx = 0;
        for(pi p : ss) {
            lw[p.f][p.s] = res[idx];
            lw[p.f][p.s] = 1 - res[idx];
            idx ++;
        }
        
    }
    vector<int> res(N);
    for(int i = 0; i < N; i ++) {
        res[i] = i;
    }
    // for(int it = 0; it < 2*N; it ++) {
    //     for(int i = 1; i < N; i ++) {
    //         if(lw[res[i-1]][res[i]]) {
    //             swap(res[i-1],res[i]);
    //         }
    //     }
    // }
    for(int &r : res) { r ++; }
    answer(res);
}

/*
g++ swaps.cpp grader.cpp -o g.exe && g.exe
5 1000
2 1 5 3 4

*/

• Subtask 1: 0 / 5
• Subtask 2: 0 / 10
• Subtask 3: 0 / 3
• Subtask 4: 0 / 2
• Subtask 5: 0 / 9
• Subtask 6: 0 / 6
• Subtask 7: 0 / 9
• Subtask 8: 0 / 6
• Subtask 9: 0 / 21
• Subtask 10: 0 / 14
• Subtask 11: 0 / 9
• Subtask 12: 0 / 6