Submission #371161

#	Time	Username	Problem	Language	Result	Execution time	Memory
371161		daniel920712	Red-blue table (IZhO19_stones)	C++14	27 / 100	60 ms	1900 KiB

stones

#include <iostream>
#include <stdio.h>
#include <stdlib.h>
#include <assert.h>

using namespace std;
int all[1005][1005];
int con[1005];
int main()
{
    int T,N,M,ans=0,i,j,k,ok=1,t;
    scanf("%d",&T);
    while(T--)
    {
        ans=0,ok=0;
        scanf("%d %d",&N,&M);
        if(N>M)
        {
            ok=1;
            swap(N,M);
        }
        if(N<=M)
        {
            ans=M;
            for(i=0;i<=N/2;i++)
            {
                con[i]=0;
                for(j=0;j<M;j++) all[i][j]=0;
            }
            for(i=N/2+1;i<N;i++)
            {
                con[i]=M;
                for(j=0;j<M;j++) all[i][j]=1;
            }

            for(i=0;i<=N/2;i++)
            {
                for(j=0;j<M;j++)
                {
                    if(con[i]<=(M-con[i]))
                    {
                        for(k=N/2+1;k<N;k++)
                        {
                            if(all[k][j]==1)
                            {
                                if(con[k]-1>(M-con[k]+1))
                                {
                                    con[k]--;
                                    con[i]++;
                                    swap(all[i][j],all[k][j]);
                                }
                            }
                        }
                    }
                }
            }

            ans=M;
            for(i=0;i<N;i++)
            {
                t=0;
                for(j=0;j<M;j++)
                {
                    //printf("%d ",all[i][j]);
                    if(all[i][j]==1) t++;
                }
                //printf("\n");
                //assert(t==con[i]);
                if(con[i]>(M-con[i])) ans++;
            }

            for(i=0;i<M;i++)
            {
                t=0;
                for(j=0;j<N;j++)
                {
                    if(all[j][i]==0) t++;

                }
                //printf("%d %d\n",i,t);
                //assert(t>(N-t));
            }
        }
        if(ok==0)
        {
            printf("%d\n",ans);
            for(i=0;i<N;i++)
            {
                for(j=0;j<M;j++)
                {
                    if(all[i][j]==0) printf("-");
                    else printf("+");
                }
                printf("\n");
            }
        }
        else
        {

            printf("%d\n",ans);
            for(i=0;i<M;i++)
            {
                for(j=0;j<N;j++)
                {
                    if(all[j][i]==1) printf("-");
                    else printf("+");
                }
                printf("\n");
            }
        }

    }
    return 0;
}

Compilation message (stderr)

stones.cpp: In function 'int main()':
stones.cpp:12:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   12 |     scanf("%d",&T);
      |     ~~~~~^~~~~~~~~
stones.cpp:16:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   16 |         scanf("%d %d",&N,&M);
      |         ~~~~~^~~~~~~~~~~~~~~

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