Submission #242744

#	Time	Username	Problem	Language	Result	Execution time	Memory
242744		SamAnd	Orchard (NOI14_orchard)	C++17	0 / 25	428 ms	27768 KiB

orchard

#include <bits/stdc++.h>
using namespace std;
#define m_p make_pair
#define all(x) (x).begin(),(x).end()
#define sz(x) ((int)(x).size())
#define fi first
#define se second
typedef long long ll;
mt19937 rnd(chrono::steady_clock::now().time_since_epoch().count());
mt19937 rnf(2106);
const int N = 1000006, INF = 1000000009;

int n, m;
int** a;

int u[N];

void solv()
{
    scanf("%d%d", &n, &m);
    a = new int*[n + 5];
    for (int i = 0; i < n + 5; ++i)
    {
        a[i] = new int[m + 5];
        for (int j = 0; j < m + 5; ++j)
            a[i][j] = 0;
    }
    int q1 = 0;
    for (int i = 1; i <= n; ++i)
    {
        for (int j = 1; j <= m; ++j)
        {
            scanf("%d", &a[i][j]);
            if (a[i][j] == 1)
                ++q1;
        }
    }
    int ans = INF;
    for (int l = 1; l <= n; ++l)
    {
        for (int j = 1; j <= m; ++j)
            u[j] = 0;
        for (int r = l; r <= n; ++r)
        {
            int p = 0;
            int maxu = 0;
            for (int j = 1; j <= m; ++j)
            {
                if (a[r][j] == 0)
                    ++u[j];
                else
                    --u[j];
                p += u[j];
                ans = min(ans, p - maxu);
                maxu = max(maxu, u[j]);
            }
        }
    }
    ans += q1;
    printf("%d\n", ans);
}

int main()
{
    #ifdef SOMETHING
    freopen("input.txt", "r", stdin);
    //freopen("output.txt", "w", stdout);
    #endif // SOMETHING
    //ios_base::sync_with_stdio(false), cin.tie(0);
    solv();
    return 0;
}

//while ((double)clock() / CLOCKS_PER_SEC <= 0.9){}

Compilation message (stderr)

orchard.cpp: In function 'void solv()':
orchard.cpp:20:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d%d", &n, &m);
     ~~~~~^~~~~~~~~~~~~~~~
orchard.cpp:33:18: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
             scanf("%d", &a[i][j]);
             ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 4
• Subtask 2: 0 / 4
• Subtask 3: 0 / 5
• Subtask 4: 0 / 3
• Subtask 5: 0 / 4
• Subtask 6: 0 / 5