Submission #1222927

#	Time	Username	Problem	Language	Result	Execution time	Memory
1222927		VMaksimoski008	Maxcomp (info1cup18_maxcomp)	C++20	15 / 100	5 ms	12104 KiB

maxcomp

#include <bits/stdc++.h>
#define ar array
//#define int long long

using namespace std;

using ll = long long;
using pii = pair<int, int>;
using pll = pair<ll, ll>;

const int mod = 1e9 + 7;
const ll inf = 1e18;
const int N = 1e3 + 5;

int n, m, a[N][N], dp1[N][N], dp2[N][N];

void rotate() {
    int b[m+1][n+1];
    for(int i=1; i<=n; i++)
        for(int j=1; j<=m; j++) b[j][n-i+1] = a[i][j];
    for(int i=1; i<=m; i++)
        for(int j=1; j<=n; j++) a[i][j] = b[i][j];
    swap(n, m);
}

int solve() {
    int ans = -1;
    for(int i=0; i<=n; i++)
        for(int j=0; j<=m; j++) dp1[i][j] = dp2[i][j] = -2e9;
    
    for(int i=1; i<=n; i++) {
        for(int j=1; j<=m; j++) {
            dp1[i][j] = max(dp1[i-1][j], dp1[i][j-1]);
            dp2[i][j] = max(dp2[i-1][j], dp2[i][j-1]);

            ans = max(ans, dp1[i][j] + a[i][j] - i - j - 1);
            ans = max(ans, dp2[i][j] - a[i][j] - i - j - 1);

            dp1[i][j] = max(dp1[i][j], -a[i][j] + i + j);
            dp2[i][j] = max(dp2[i][j], a[i][j] + i + j);
        }
    }
    
    return ans;
}

signed main() {
    cin >> n >> m;
    for(int i=1; i<=n; i++)
        for(int j=1; j<=m; j++) cin >> a[i][j];

    int ans = -1;
    for(int i=0; i<4; i++) {
        ans = max(ans, solve());
        rotate();
    }

    cout << ans << '\n';
}

• Subtask 1: 0 / 15
• Subtask 2: 15 / 15
• Subtask 3: 0 / 30
• Subtask 4: 0 / 40