Submission #95129

#	Time	Username	Problem	Language	Result	Execution time	Memory
95129		karma	Orchard (NOI14_orchard)	C++11	25 / 25	213 ms	10232 KiB

orchard

#include<bits/stdc++.h>
#define For(i, a, b)  for(int i = a, _b = b; i <= _b; ++i)
#define Ford(i, a, b) for(int i = a, _b = b; i >= _b; --i)
#define FileName      "test"
#define ll            long long
#define ld            long double
#define ull           unsigned long long
#define Print(x)      cerr << #x << "is " << x << '\n';
#define pb            push_back
#define X             first
#define Y             second
//#define Karma

using namespace std;

template<typename T> inline void Cin(T &x)
{
    char c;
    T sign = 1;
    x = 0;
    for (c = getchar(); c < '0' || c > '9'; c = getchar())
        if (c == '-') sign = -1;
    for (; c >= '0' && c <= '9'; c = getchar())
        x = x * 10 + c - '0';
    x *= sign;
}
template <typename T> inline void Out(T x) {if(x > 9) Out(x / 10); putchar(x % 10 + '0');}
template <typename T> inline void Cout(T x, char c) {if(x < 0) putchar('-'); x = abs(x); Out(x); putchar(c);}
template <typename T, typename... Args> inline void Cin(T& a, Args&... args) {Cin(a);Cin(args...);}
template <typename T, typename... Args> inline void Cout(T a, char c, Args... args) {Cout(a, c);Cout(args...);}

typedef pair<int, int> pii;
typedef pair<ll, int> plli;
const int N = 5e3 + 7;

int x, n, m, res, Min;
vector<vector<int>> a;

int Sum(int x, int y, int u, int v)
{
    return a[x - 1][y - 1] + a[u][v] - a[x - 1][v] - a[u][y - 1];
}

void Enter()
{
     Cin(n, m);
     a.resize(n + 1);
     for(int i = 0; i <= n; ++i) a[i].resize(m + 1, 0);
     for(int i = 1; i <= n; ++i) {
        for(int j = 1; j <= m; ++j) {
            Cin(x);
            if(x) ++ res, x = -1;
            else x = 1;
            a[i][j] = a[i][j - 1] + a[i - 1][j] + x - a[i - 1][j - 1];
        }
     }
}

/*
5 7
0 0 1 0 0 1 0
0 1 1 1 1 1 0
0 1 1 0 0 1 0
0 1 1 1 1 1 0
0 0 1 0 0 1 0
*/

void Solve()
{
     Min = n * m;
     for(int i = 1; i <= n; ++i) {
        for(int j = i; j <= n; ++j) {
            int Pre, s;
            Min = min(Min, s = Sum(i, 1, j, 1));
            Pre = max(s, 0);
            for(int k = 2; k <= m; ++k) {
               s += Sum(i, k, j, k);
               //cout << i << ' ' << j << ' ' << k << ' ' << s << ' ' << Pre << '\n';
               Min = min(Min, s - Pre);
               Pre = max(Pre, s);
            }
        }
     }
     cout << res + Min;
}

int main()
{
    ios_base::sync_with_stdio(0);
    cin.tie(0); cout.tie(0);
#ifdef Karma
    freopen(FileName".inp", "r", stdin);
    freopen(FileName".out", "w", stdout);
#endif // Karma

    Enter();
    Solve();

    return 0;
}

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