Submission #340107

#	Time	Username	Problem	Language	Result	Execution time	Memory
340107		kkk	Red-blue table (IZhO19_stones)	C++14	100 / 100	39 ms	3308 KiB

stones

#include<iostream>
#include<algorithm>
#define endl '\n'
using namespace std;
long long n,m;
char s[1003][1003],ans2[1002][1002];
bool p=false;
char k;
void sol()
{
    long long i,j,d,a;
    d=(n-1)/2*m;
    for(i=0;i<n;i++)
    {
        for(j=0;j<m;j++)
        {
            ans2[i][j]=k;
        }
    }
    j=0,a=0;
    for(i=0;i<d;i++)
    {
        if(k=='+')ans2[j][i%m]='-';
        else ans2[j][i%m]='+';a++;
        if(2*a>m){j++;a=0;}
    }
 cout<<m+j<<endl;
    if(p)swap(m,n);
    for(i=0;i<n;i++)
    {
        for(j=0;j<m;j++)
        {
            if(!p)s[i][j]=ans2[i][j];
            else s[i][j]=ans2[j][i];
        }
    }


    for(i=0;i<n;i++)
    {
        for(j=0;j<m;j++)
        {
            cout<<s[i][j];
        }cout<<endl;
    }

}
int main()
{
    ios::sync_with_stdio(0);
    cin.tie(0);
    cout.tie(0);

    long long t,i,j;
    cin>>t;
    for(i=0;i<t;i++)
    {
        cin>>n>>m;
        p=false;k='-';
        if(m<=n){swap(n,m);k='+';p=true;}
        sol();
    }



}

Compilation message (stderr)

stones.cpp: In function 'void sol()':
stones.cpp:24:9: warning: this 'else' clause does not guard... [-Wmisleading-indentation]
   24 |         else ans2[j][i%m]='+';a++;
      |         ^~~~
stones.cpp:24:31: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'else'
   24 |         else ans2[j][i%m]='+';a++;
      |                               ^
stones.cpp: In function 'int main()':
stones.cpp:54:19: warning: unused variable 'j' [-Wunused-variable]
   54 |     long long t,i,j;
      |                   ^

• Subtask 1: 17 / 17
• Subtask 2: 10 / 10
• Subtask 3: 16 / 16
• Subtask 4: 11 / 11
• Subtask 5: 15 / 15
• Subtask 6: 31 / 31