Submission #868140

#	Time	Username	Problem	Language	Result	Execution time	Memory
868140		heeheeheehaaw	Red-blue table (IZhO19_stones)	C++17	Compilation error	0 ms	0 KiB

stones

#include <bits/stdc++.h>

using namespace std;

int a[1005][1005];
int b[1005][1005];
int ra, rb;

int main()
{
    int t, n, m;
    cin>>t;
    while(t--)
    {
        cin>>n>>m;
        ra = 0, rb = 0;
        for(int i = 1; i <= n; i++)
            for(int j = 1; j <= m; j++)
                a[i][j] = 0, b[i][j] = 1;
        int ln = m / 2;
        if(m % 2 == 0) ln--;
        int lm = n / 2;
        if(n % 2 == 0) lm--;

        queue<pair<int, int>> q;
        for(int i = 1; i <= n; i++)
            if(ln > 0)
                q.push({ln, i});

        for(int j = 1; j <= m; j++)
        {
            int nr = n - lm;
            while(nr-- && (int)q.size())
            {
                pair<int, int> curr = q.front();
                q.pop();

                a[curr.second][j] = 1;
                if(curr.first > 1)
                     q.push({curr.first - 1, curr.second});
            }
        }

        while((int)q.size())
            q.pop();
        for(int j = 1; j <= m; j++)
             if(lm > 0)
                q.push({lm, j});

        for(int i = 1; i <= n; i++)
        {
            int nr = m - ln;
            while(nr-- && (int)q.size())
            {
                pair<int, int> curr = q.front();
                q.pop();

                b[i][curr.second] = 0;
                if(curr.first > 1)
                     q.push({curr.first - 1, curr.second});
            }
        }

        for(int i = 1; i <= n; i++)
        {
            int nr0 = 0, nr1 = 0;
            for(int j = 1; j <= m; j++)
                if(a[i][j] == 0) nr0++;
                else nr1++;
            if(nr0 > nr1) ra++;
        }

        for(int j = 1; j <= m; j++)
        {
            int nr0 = 0, nr1 = 0;
            for(int i = 1; i <= n; i++)
                if(a[i][j] == 0) nr0++;
                else nr1++;
            if(nr0 < nr1) ra++;
        }

        for(int i = 1; i <= n; i++)
        {
            int nr0 = 0, nr1 = 0;
            for(int j = 1; j <= m; j++)
                if(b[i][j] == 0) nr0++;
                else nr1++;
            if(nr0 > nr1) rb++;
        }

        for(int j = 1; j <= m; j++)
        {
            int nr0 = 0, nr1 = 0;
            for(int i = 1; i <= n; i++)
                if(b[i][j] == 0) nr0++;
                else nr1++;
            if(nr0 < nr1) rb++;
        }

        if(ra < rb)
            swap(a, b);
        cout<<max(ra, rb)<<'\n';a
        for(int i = 1; i <= n; i++)
        {
            for(int j = 1; j <= m; j++)
            {
                if(a[i][j] == 0)
                    cout<<"+";
                else
                    cout<<"-";
            }

            cout<<'\n';
        }
    }
    return 0;
}

Compilation message (stderr)

stones.cpp: In function 'int main()':
stones.cpp:102:34: error: expected ';' before 'for'
  102 |         cout<<max(ra, rb)<<'\n';a
      |                                  ^
      |                                  ;
  103 |         for(int i = 1; i <= n; i++)
      |         ~~~                       
stones.cpp:102:33: warning: statement has no effect [-Wunused-value]
  102 |         cout<<max(ra, rb)<<'\n';a
      |                                 ^
stones.cpp:103:24: error: 'i' was not declared in this scope
  103 |         for(int i = 1; i <= n; i++)
      |                        ^