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Submission #444634

# Submission time Handle Problem Language Result Execution time Memory
444634 2021-07-14T13:20:31 Z gratus907 Raisins (IOI09_raisins) C++17
100 / 100
 540 ms 70148 KB 
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#pragma GCC optimize("Ofast")
#pragma GCC target("avx,avx2,fma")
#define ll long long
#define eps 1e-7
#define all(x) ((x).begin()),((x).end())
#define usecppio ios::sync_with_stdio(0);cin.tie(0);cout.tie(0);
using namespace std;
#define int ll
using pii = pair<int, int>;

int n, m;
int r[52][52];
int pr[52][52];
int s[52][52][52][52];
int dp[52][52][52][52];

int solve(int r1, int c1, int r2, int c2) {
    if (r1 > r2 || c1 > c2) return 0;
    if (r1 == r2 && c1 == c2) return 0;
    if (dp[r1][c1][r2][c2]) return dp[r1][c1][r2][c2];
    int val = INT_MAX;
    int tot = s[r1][c1][r2][c2];
    
    for (int i = r1; i < r2; i++)
        val = min(val, tot + solve(r1, c1, i, c2) + solve(i+1, c1, r2, c2));
    for (int i = c1; i < c2; i++)
        val = min(val, tot + solve(r1, c1, r2, i) + solve(r1, i+1, r2, c2));
    
    return dp[r1][c1][r2][c2] = val;
}
int32_t main() {
 	usecppio
    cin >> n >> m;
    for (int i = 1; i <= n; i++) {
        for (int j = 1; j <= m; j++) {
            cin >> r[i][j];
            pr[i][j] = pr[i-1][j] + pr[i][j-1] - pr[i-1][j-1] + r[i][j];
        }
    }
    
    for (int r2 = 1; r2 <= n; r2++)
        for (int c2 = 1; c2 <= m; c2++)
            for (int r1 = 1; r1 <= r2; r1++)
                for (int c1 = 1; c1 <= c2; c1++)
                    s[r1][c1][r2][c2] = pr[r2][c2]-pr[r2][c1-1]-pr[r1-1][c2]+pr[r1-1][c1-1];

    cout << solve(1, 1, n, m) << '\n';
}

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 320 KB Output is correct
2 Correct 1 ms 332 KB Output is correct
3 Correct 1 ms 460 KB Output is correct
4 Correct 1 ms 460 KB Output is correct
5 Correct 1 ms 716 KB Output is correct
6 Correct 2 ms 1612 KB Output is correct
7 Correct 2 ms 1996 KB Output is correct
8 Correct 11 ms 6632 KB Output is correct
9 Correct 18 ms 9584 KB Output is correct
10 Correct 21 ms 11584 KB Output is correct
11 Correct 17 ms 9668 KB Output is correct
12 Correct 57 ms 21068 KB Output is correct
13 Correct 91 ms 27544 KB Output is correct
14 Correct 26 ms 11928 KB Output is correct
15 Correct 145 ms 31244 KB Output is correct
16 Correct 13 ms 10520 KB Output is correct
17 Correct 53 ms 22340 KB Output is correct
18 Correct 281 ms 52036 KB Output is correct
19 Correct 468 ms 64308 KB Output is correct
20 Correct 540 ms 70148 KB Output is correct