제출 #388087

#	제출 시각UTC-0	아이디	문제	언어	결과	실행 시간	메모리
388087	2021-04-10 04:26:27	blue	Group Photo (JOI21_ho_t3)	C++17	100 / 100	399 ms	165320 KiB

Main

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#include <iostream>
using namespace std;
int inv[5001][5001];
int main()
{
    int N;
    cin >> N;
    int H[N+1], pos[N+1];
    for(int i = 1; i <= N; i++) cin >> H[i];
    for(int i = 1; i <= N; i++) pos[ H[i] ] = i;
    int lowct[N+1][N+1]; //number of positions <= j with value greater than i
    for(int i = 1; i <= N; i++)
    {
        lowct[i][0] = 0;
        for(int j = 1; j <= N; j++)
        {
            lowct[i][j] = lowct[i][j-1] + (pos[j] > pos[i]);
        }
    }
    for(int i = 1; i <= N; i++)
    {
        inv[i][i] = 0;
        for(int j = i+1; j <= N; j++)
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 32 / 32
• Subtask 4: 20 / 20
• Subtask 5: 36 / 36