oj.uz

Submission #698145

# Submission time Handle Problem Language Result Execution time Memory
698145 2023-02-12T13:32:55 Z europium Raisins (IOI09_raisins) C++17
80 / 100
 5000 ms 30740 KB 
// - 12/2/23
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <numeric>
#include <cmath>
#include <iterator>
#include <set>
#include <map>
#include <math.h>
#include <iomanip>
#include <unordered_set>
#include <queue>
#include <climits>
using namespace std;
// clang++ -std=c++17 IOI09_Raisins.cpp && ./a.out

using ll = long long;
int n, m;
vector<vector<int>> grid, pref;
map<tuple<int,int,int,int>,int> dp;

int sum(int x1, int y1, int x2, int y2){
    x2++;
    y2++;
    return pref[x2][y2] - pref[x2][y1] - pref[x1][y2] + pref[x1][y1];
}

int get(int x1, int y1, int x2, int y2){
    if (dp.count({x1, y1, x2, y2}) == 1) return dp[{x1, y1, x2, y2}];
    if (x1 == x2 && y1 == y2) return 0;

    int res = INT_MAX;

    // horizontal cuts
    for (int i = x1; i < x2; i++){
        res = min(res, get(x1, y1, i, y2) + get(i + 1, y1, x2, y2) + sum(x1, y1, i, y2) + sum(i + 1, y1, x2, y2));
    }

    // vertical cuts
    for (int j = y1; j < y2; j++){
        res = min(res, get(x1, y1, x2, j) + get(x1, j + 1, x2, y2) + sum(x1, y1, x2, j) + sum(x1, j + 1, x2, y2));
    }

    dp[{x1, y1, x2, y2}] = res;

    // cout << x1 << ' ' << y1 << ' ' << x2 << ' ' << y2 << ' ' << res << '\n';
    return res;
}

void solve(){
    cin >> n >> m;

    grid.resize(n, vector<int> (m));
    pref.resize(n + 1, vector<int> (m + 1));

    for (int i = 0; i < n; i++){
        for (int j = 0; j < m; j++) cin >> grid[i][j];
    }

    for (int i = 1; i <= n; i++){
        for (int j = 1; j <= m; j++){
            pref[i][j] = grid[i-1][j-1] + pref[i-1][j] + pref[i][j-1] - pref[i-1][j-1];
        }
    }

    // for (int i = 0; i <= n; i++){
    //     for (int j = 0; j <= m; j++) cout << pref[i][j] << ' ';
    //     cout << '\n';
    // }

    cout << get(0, 0, n - 1, m - 1);
    cout << '\n';
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);

    // freopen("input.txt", "r", stdin);
    solve();

    return 0;
}

Subtask #1
80.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 212 KB Output is correct
2 Correct 0 ms 212 KB Output is correct
3 Correct 1 ms 212 KB Output is correct
4 Correct 0 ms 212 KB Output is correct
5 Correct 1 ms 340 KB Output is correct
6 Correct 8 ms 504 KB Output is correct
7 Correct 10 ms 468 KB Output is correct
8 Correct 233 ms 3192 KB Output is correct
9 Correct 441 ms 5004 KB Output is correct
10 Correct 681 ms 6928 KB Output is correct
11 Correct 544 ms 5984 KB Output is correct
12 Correct 2311 ms 16796 KB Output is correct
13 Correct 4107 ms 25136 KB Output is correct
14 Correct 945 ms 8928 KB Output is correct
15 Execution timed out 5041 ms 29592 KB Time limit exceeded
16 Correct 342 ms 3456 KB Output is correct
17 Correct 1917 ms 13464 KB Output is correct
18 Execution timed out 5061 ms 30724 KB Time limit exceeded
19 Execution timed out 5056 ms 30740 KB Time limit exceeded
20 Execution timed out 5046 ms 30664 KB Time limit exceeded