Submission #95030

#	Time	Username	Problem	Language	Result	Execution time	Memory
95030		Osama_Alkhodairy	Maxcomp (info1cup18_maxcomp)	C++17	100 / 100	129 ms	17140 KiB

maxcomp

#include <bits/stdc++.h>
using namespace std;
#define finish(x) return cout << x << endl, 0
#define ll long long

int n, m, grid[1001][1001], mn[1001][1001];

int solve(){
    for(int i = 0 ; i <= n ; i++)
        for(int j = 0 ; j <= m ; j++)
            mn[i][j] = 1e9;
    for(int i = 1 ; i <= n ; i++)
        for(int j = 1 ; j <= m ; j++)
            grid[i][j] -= i + j;
    for(int i = 1 ; i <= n ; i++)
        for(int j = 1 ; j <= m ; j++)
            mn[i][j] = min(mn[i - 1][j], min(mn[i][j - 1], grid[i][j]));
    int ret = 0;
    for(int i = 1 ; i <= n ; i++)
        for(int j = 1 ; j <= m ; j++)
            ret = max(ret, grid[i][j] - mn[i][j]);
    for(int i = 1 ; i <= n ; i++)
        for(int j = 1 ; j <= m ; j++)
            grid[i][j] += i + j;
    return ret;
}
void flip1(){
    for(int i = 1 ; i <= n ; i++){
        int l = 1, r = m;
        while(l <= r){
            swap(grid[i][l], grid[i][r]);
            l++; r--;
        }
    }
}
void flip2(){
    for(int i = 1 ; i <= m ; i++){
        int l = 1, r = n;
        while(l <= r){
            swap(grid[l][i], grid[r][i]);
            l++; r--;
        }
    }
}
int main(){
    ios_base::sync_with_stdio(0);
    cin.tie(0);
    cin >> n >> m;
    for(int i = 1 ; i <= n ; i++)
        for(int j = 1 ; j <= m ; j++)
            cin >> grid[i][j];
    int ans = solve();
    flip1();
    ans = max(ans, solve());
    flip2();
    ans = max(ans, solve());
    flip1();
    ans = max(ans, solve());
    cout << ans - 1 << endl;
}

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