oj.uz

Submission #252340

# Submission time Handle Problem Language Result Execution time Memory
252340 2020-07-25T10:09:41 Z SamAnd Raisins (IOI09_raisins) C++17
100 / 100
 712 ms 30484 KB 
#include <bits/stdc++.h>
using namespace std;
const int N = 55, INF = 1000000009;

int n, m;
int a[N][N];

int p[N][N];
void pre()
{
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j <= m; ++j)
        {
            p[i][j] = p[i - 1][j] + p[i][j - 1] - p[i - 1][j - 1] + a[i][j];
        }
    }
}

int sum(int x1, int y1, int x2, int y2)
{
    return p[x2][y2] - p[x1 - 1][y2] - p[x2][y1 - 1] + p[x1 - 1][y1 - 1];
}

bool c[N][N][N][N];
int dp[N][N][N][N];
int rec(int x1, int y1, int x2, int y2)
{
    if (c[x1][y1][x2][y2])
        return dp[x1][y1][x2][y2];
    c[x1][y1][x2][y2] = true;
    if (x1 == x2 && y1 == y2)
        return 0;
    dp[x1][y1][x2][y2] = INF;
    int s = sum(x1, y1, x2, y2);
    for (int i = x1; i < x2; ++i)
        dp[x1][y1][x2][y2] = min(dp[x1][y1][x2][y2], s + rec(x1, y1, i, y2) + rec(i + 1, y1, x2, y2));
    for (int j = y1; j < y2; ++j)
        dp[x1][y1][x2][y2] = min(dp[x1][y1][x2][y2], s + rec(x1, y1, x2, j) + rec(x1, j + 1, x2, y2));
    return dp[x1][y1][x2][y2];
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    #endif // SOMETHING
    scanf("%d%d", &n, &m);
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j <= m; ++j)
            scanf("%d", &a[i][j]);
    }
    pre();
    printf("%d\n", rec(1, 1, n, m));
    return 0;
}

Compilation message

raisins.cpp: In function 'int main()':
raisins.cpp:48:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
raisins.cpp:52:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &a[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~

Subtask #1
100.0 / 100.0

# Verdict Execution time Memory Grader output
1 Correct 0 ms 384 KB Output is correct
2 Correct 0 ms 384 KB Output is correct
3 Correct 0 ms 512 KB Output is correct
4 Correct 0 ms 512 KB Output is correct
5 Correct 1 ms 640 KB Output is correct
6 Correct 1 ms 1152 KB Output is correct
7 Correct 2 ms 1408 KB Output is correct
8 Correct 10 ms 4096 KB Output is correct
9 Correct 17 ms 5376 KB Output is correct
10 Correct 24 ms 6400 KB Output is correct
11 Correct 21 ms 5632 KB Output is correct
12 Correct 71 ms 10744 KB Output is correct
13 Correct 118 ms 13560 KB Output is correct
14 Correct 33 ms 6904 KB Output is correct
15 Correct 145 ms 15008 KB Output is correct
16 Correct 14 ms 5248 KB Output is correct
17 Correct 62 ms 10488 KB Output is correct
18 Correct 386 ms 23168 KB Output is correct
19 Correct 619 ms 28280 KB Output is correct
20 Correct 712 ms 30484 KB Output is correct