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답안 #931224

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
931224 2024-02-21T11:52:50 Z LucaIlie The Potion of Great Power (CEOI20_potion) C++17
0 / 100
 219 ms 262144 KB 
#include <bits/stdc++.h>

using namespace std;

struct change {
    int time, val;
};

const int MAX_N = 1e5;
const int MAX_M = 2e5;
int n, m, d;
int h[MAX_N], a[MAX_M], b[MAX_M];
unordered_map<int, int> pos[MAX_N];
vector<int> trust[MAX_N];
set<int> hx, hy;
vector<vector<change>> changes[MAX_N];
vector<change> emptyV;

void init( int N, int D, int H[] ) {
    n = N;
    d = D;
    for ( int i = 0; i < n; i++ )
        h[i] = H[i];
    for ( int i = 0; i < n; i++ )
        trust[i].push_back( i );
}

void curseChanges( int M, int A[], int B[] ) {
    m = M;
    for ( int i = 0; i < M; i++ ) {
        a[i] = A[i];
        b[i] = B[i];
    }
    emptyV.push_back( { -1, -1 } );
    for ( int i = 0; i < n; i++ ) {
        changes[i].resize( d + 1 );
        for ( int j = 1; j <= d; j++ )
            changes[i][j].push_back( { -1, -1 } );
    }

    for ( int i = 0; i < m; i++ ) {
        if ( changes[a[i]].size() == trust[a[i]].size() )
            changes[a[i]].push_back( emptyV );
        if ( changes[b[i]].size() == trust[b[i]].size() )
            changes[b[i]].push_back( emptyV );

        if ( pos[a[i]][b[i]] == 0 ) {
            pos[a[i]][b[i]] = trust[a[i]].size();
            changes[a[i]][trust[a[i]].size()].push_back( { i, b[i] } );
            trust[a[i]].push_back( b[i] );

            pos[b[i]][a[i]] = trust[b[i]].size();
            changes[b[i]][trust[b[i]].size()].push_back( { i, a[i] } );
            trust[b[i]].push_back( a[i] );
        } else {
            int p, l;

            p = pos[a[i]][b[i]], l = trust[a[i]].size() - 1;
            swap( pos[a[i]][b[i]], pos[a[i]][trust[a[i]][l]] );
            swap( trust[a[i]][p], trust[a[i]][l] );
            changes[a[i]][p].push_back( { i, trust[a[i]][p] } );
            changes[a[i]][l].push_back( { i, -1 } );
            pos[a[i]][trust[a[i]][l]] = 0;
            trust[a[i]].pop_back();

            p = pos[b[i]][a[i]], l = trust[b[i]].size() - 1;
            swap( pos[b[i]][a[i]], pos[b[i]][trust[b[i]][l]] );
            swap( trust[b[i]][p], trust[b[i]][l] );
            changes[b[i]][p].push_back( { i, trust[b[i]][p] } );
            changes[b[i]][l].push_back( { i, -1 } );
            pos[b[i]][trust[b[i]][l]] = 0;
            trust[b[i]].pop_back();
        }
    }

    /*for ( int i = 0; i < n; i++ ) {
        printf( "%d: \n", i );
        for ( int j = 1; j <= d; j++ ) {
            for ( change ch: changes[i][j] )
                printf( "%d %d\n", ch.time, ch.val );
            printf( "\n" );
        }
        printf( "\n" );
    }*/
}

int question( int x, int y, int t ) {
    hx.clear();
    for ( int i = 1; i < changes[x].size(); i++ ) {
        int l = 0, r = changes[x][i].size();
        while ( r - l > 1 ) {
            int mid = (l + r) / 2;

            if ( changes[x][i][mid].time < t )
                l = mid;
            else
                r = mid;
        }
        if ( changes[x][i][l].val != -1 )
            hx.insert( h[changes[x][i][l].val] );
    }
    hy.clear();
    for ( int i = 1; i < changes[y].size(); i++ ) {
        int l = 0, r = changes[y][i].size();
        while ( r - l > 1 ) {
            int mid = (l + r) / 2;

            if ( changes[y][i][mid].time < t )
                l = mid;
            else
                r = mid;
        }
        if ( changes[y][i][l].val != -1 )
            hy.insert( h[changes[y][i][l].val] );
    }

    int minDist = 1e9;
    for ( int l: hx ) {
        auto p = hy.upper_bound( l );
        if ( p != hy.end() )
            minDist = min( minDist, *p - l );
        if ( p != hy.begin() ) {
            p--;
            minDist = min( minDist, l - *p );
        }
    }

    return minDist;
}

Compilation message

potion.cpp: In function 'int question(int, int, int)':
potion.cpp:89:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<change> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   89 |     for ( int i = 1; i < changes[x].size(); i++ ) {
      |                      ~~^~~~~~~~~~~~~~~~~~~
potion.cpp:103:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<change> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
  103 |     for ( int i = 1; i < changes[y].size(); i++ ) {
      |                      ~~^~~~~~~~~~~~~~~~~~~

Subtask #1
0.0 / 0.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10840 KB Output is correct

Subtask #2
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 4 ms 11352 KB Output is correct
2 Correct 7 ms 13656 KB Output is correct
3 Correct 31 ms 38488 KB Output is correct
4 Runtime error 219 ms 262144 KB Execution killed with signal 9
5 Halted 0 ms 0 KB -

Subtask #3
0 / 14.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 212 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #4
0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 208 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #5
0 / 21.0

# 결과 실행 시간 메모리 Grader output
1 Runtime error 187 ms 262144 KB Execution killed with signal 9
2 Halted 0 ms 0 KB -

Subtask #6
0 / 30.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 10840 KB Output is correct
2 Correct 4 ms 11352 KB Output is correct
3 Correct 7 ms 13656 KB Output is correct
4 Correct 31 ms 38488 KB Output is correct
5 Runtime error 219 ms 262144 KB Execution killed with signal 9
6 Halted 0 ms 0 KB -