Submission #51233

#	Time	Username	Problem	Language	Result	Execution time	Memory
51233		Kubalionzzale	Orchard (NOI14_orchard)	C++14	25 / 25	378 ms	12544 KiB

orchard

#include <iostream>
#include <vector>

std::vector< std::vector<int> > g(160);

#define int long long int

main()
{
    int n, m;
    std::cin >> n >> m;

    int cnt = 0;
    for (int i = 0; i < n; ++i)
    {
        for (int j = 0; j < m; ++j)
        {
            int x;
            std::cin >> x;

            if (x == 0)
            {
                g[i].push_back(-1);
            }
            else
            {
                g[i].push_back(1);
                ++cnt;
            }
        }
    }

    if (cnt == 0)
    {
        std::cout << 0;
        return 0;
    }

    int maxSum = 0, lmax, rmax, topmax, bottommax;
    for (int i = 0; i < n; ++i)
    {
        int sum[1000010] = { 0 };
        for (int k = i; k < n; ++k)
        {
            int last = 0;
            int curSum = 0;
            for (int j = 0; j < m; ++j)
            {
                sum[j] += g[k][j];
                curSum += sum[j];

                if (curSum < 0)
                {
                    last = j + 1;
                    curSum = 0;
                }
                else if (curSum > maxSum)
                {
                    maxSum = curSum;
                    lmax = last;
                    rmax = j;
                    topmax = i;
                    bottommax = k;
                }
            }
        }
    }

 //   std::cout << topmax << " " << bottommax << " " << lmax << " " << rmax << " " << maxSum << "\n";
    int sumOfZero = 0, sumOfOne = 0;
    for (int i = topmax; i <= bottommax; ++i)
    {
        for (int j = lmax; j <= rmax; ++j)
        {
            if (g[i][j] == -1)
                ++sumOfZero;
            else
                ++sumOfOne;
        }
    }

    std::cout << cnt - sumOfOne + sumOfZero;
}

Compilation message (stderr)

orchard.cpp:8:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main()
      ^
orchard.cpp: In function 'int main()':
orchard.cpp:39:41: warning: 'bottommax' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int maxSum = 0, lmax, rmax, topmax, bottommax;
                                         ^~~~~~~~~
orchard.cpp:39:33: warning: 'topmax' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int maxSum = 0, lmax, rmax, topmax, bottommax;
                                 ^~~~~~
orchard.cpp:39:27: warning: 'rmax' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int maxSum = 0, lmax, rmax, topmax, bottommax;
                           ^~~~
orchard.cpp:39:21: warning: 'lmax' may be used uninitialized in this function [-Wmaybe-uninitialized]
     int maxSum = 0, lmax, rmax, topmax, bottommax;
                     ^~~~

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