Submission #950688

#	Time	Username	Problem	Language	Result	Execution time	Memory
950688		Irate	Orchard (NOI14_orchard)	C++17	25 / 25	133 ms	19996 KiB

orchard

#include<cstdio>
#include<vector>
using namespace std;
int main(){
    int n, m;
    scanf("%d %d", &n, &m);
    vector<vector<int>>grid(n + 1, vector<int>(m + 1));
    vector<vector<int>>pref(n + 1, vector<int>(m + 1));
    for(int i = 1;i <= n;++i){
        for(int j = 1;j <= m;++j){
            scanf("%d", &grid[i][j]);
            pref[i][j] = pref[i - 1][j] + pref[i][j - 1] - pref[i - 1][j - 1] + grid[i][j];
        }
    }
    int res = 1e9, total = pref[n][m];
    for(int k = 1;k <= n;++k){
        for(int i = 1;i + k - 1 <= n;++i){
            int mn = -1;
            for(int j = 1;j <= m;++j){
                int sum = pref[i + k - 1][j] - pref[i - 1][j];
                res = min(res, j * k - 2 * sum + total + k + mn);
                mn = min(mn, 2 * sum - k * (j + 1));
            }
        }
    }
    printf("%d", res);
}

Compilation message (stderr)

orchard.cpp: In function 'int main()':
orchard.cpp:6:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
    6 |     scanf("%d %d", &n, &m);
      |     ~~~~~^~~~~~~~~~~~~~~~~
orchard.cpp:11:18: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 |             scanf("%d", &grid[i][j]);
      |             ~~~~~^~~~~~~~~~~~~~~~~~~

• Subtask 1: 4 / 4
• Subtask 2: 4 / 4
• Subtask 3: 5 / 5
• Subtask 4: 3 / 3
• Subtask 5: 4 / 4
• Subtask 6: 5 / 5