Submission #145879

#	Time	Username	Problem	Language	Result	Execution time	Memory
145879		davitmarg	Red-blue table (IZhO19_stones)	C++17	27 / 100	94 ms	1464 KiB

stones

/*DavitMarg*/
#include <iostream>
#include <algorithm>
#include <cmath>
#include <vector>
#include <string>
#include <cstring>
#include <map>
#include <unordered_map>
#include <set>
#include <queue>
#include <iomanip>
#include <stack>
#include <cassert>
#include <iterator>
#include <bitset>
#include <fstream>
#define mod 998244353ll
#define LL long long
#define LD long double
#define MP make_pair
#define PB push_back
#define all(v) v.begin(),v.end()
using namespace std;
 
int t,n,m,ans,rev;
char a[1003][1003],sum[1003];
int main()
{
    cin>>t;
    while(t--)
    {
        rev=0;
        cin>>n>>m;
        if(m<n)
        {
            swap(m,n);
            rev=1;
        }
        priority_queue<pair<int,int>> q;
        for(int i=1;i<=n;i++)
            for(int j=1;j<=m;j++)
                a[i][j]='+';
 
        for(int i=1;i<=n;i++)
            q.push(MP(0,i));
 
        for(int j=1;j<=m;j++)
        {
            vector<pair<int,int>> d; 
            for(int i=1;i<=n/2+1;i++)
            {
                pair<int,int> p=q.top();
                q.pop();
                p.first++;
                sum[p.second]++;
                if(p.first==m-m/2-1)
                    p.first=-mod;
                if(sum[p.second]>=m/2+1)
                    p.first=mod;
                d.PB(p);
                a[p.second][j]='-';
            }
            while(!d.empty())
            {
                q.push(d.back());
                d.pop_back();
            }
        }
        ans=m;
        for(int i=1;i<=n;i++)
        {
            int sum=0;
            for(int j=1;j<=m;j++)
                sum+=(a[i][j]=='+');
            ans+=(sum>=m/2+1);
        }
        printf("%d\n",ans);
        if(!rev)
            for(int i=1;i<=n;i++)
            {
                for(int j=1;j<=m;j++)
                    printf("%c",a[i][j]);
                printf("\n");
            }
        else
        {
            for(int j=1;j<=m;j++)
            {
                for(int i=1;i<=n;i++)
                {
                    if(a[i][j]=='+')
                        a[i][j]='-';
                    else
                        a[i][j]='+';
                    
                    printf("%c",a[i][j]);
                }
                printf("\n");
            }
        }
        
 
    }
    
    
	return 0;
}
 
/*

2
1 3
3 3

 
*/

• Subtask 1: 17 / 17
• Subtask 2: 10 / 10
• Subtask 3: 0 / 16
• Subtask 4: 0 / 11
• Subtask 5: 0 / 15
• Subtask 6: 0 / 31