Submission #879014

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
879014	2023-11-26 06:00:44	frostray8653	Group Photo (JOI21_ho_t3)	C++17	100 / 100	525 ms	392576 KiB

Main

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#include <bits/stdc++.h>
#define int long long
#define IO ios::sync_with_stdio(0), cin.tie(0);
#define FOR(i, a, b) for (int i = a; i <= b; i++)
using namespace std;
using pii = pair<int, int>;
void dbg() {;}
template<class T, class ...U>
void dbg(T a, U ...b) { cout << a << " "; dbg(b...); }
void ent() { cout << "\n"; }
const int INF = 1e16;
const int N = 5005;
int a[N], pos[N];
int cnt[2][N][N];
int dp[N];
signed main() {
    IO;
    int n;
    cin >> n;
    FOR(i, 1, n) {
        cin >> a[i];
        pos[a[i]] = i;
    }
    FOR(i, 1, n) {
        int x = pos[i];
        for (int j = 1; j <= n; j++) {
            cnt[0][i][j] = cnt[0][i - 1][j] + cnt[0][i][j - 1] - cnt[0][i - 1][j - 1];
 
 
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• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 32 / 32
• Subtask 4: 20 / 20
• Subtask 5: 36 / 36