Submission #549299

#	Time	Username	Problem	Language	Result	Execution time	Memory
549299		krit3379	Red-blue table (IZhO19_stones)	C++17	15 / 100	96 ms	3956 KiB

stones

#include<bits/stdc++.h>
using namespace std;
#define N 1005

int board[N][N],cnt[N];
priority_queue<pair<int,int>> q;

void sol(){
    int n,m,nn,mm,ma,ans,a,i,j,cou;
    scanf("%d %d",&n,&m);
    nn=n/2+1;
    mm=m/2+1;
    ans=0,ma=a=n;
    for(i=1;i<=n;i++){
        for(j=1;j<=m;j++)board[i][j]=0;
        cnt[i]=m;
    }
    for(i=1;i<=m;i++){
        for(j=1;j<=n;j++){
            q.push({cnt[j],j});
        }
        cou=nn;
        while(!q.empty()&&cou>0){
            auto [x,y]=q.top();
            q.pop();
            if(--cnt[y]<mm)a--;
            board[y][i]=1;
            cou--;
        }
        if(a+i>ma)ma=a+i,ans=i;
        while(!q.empty())q.pop();
    }
    printf("%d\n",ma);
    for(i=1;i<=n;i++){
        for(j=1;j<=m;j++){
            if(j<=ans)printf("%c",board[i][j]?'-':'+');
            else printf("+");
        }
        printf("\n");
    }
}

int main(){
    int t;
    scanf("%d",&t);
    while(t--)sol();
    return 0;
}

Compilation message (stderr)

stones.cpp: In function 'void sol()':
stones.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   10 |     scanf("%d %d",&n,&m);
      |     ~~~~~^~~~~~~~~~~~~~~
stones.cpp: In function 'int main()':
stones.cpp:45:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   45 |     scanf("%d",&t);
      |     ~~~~~^~~~~~~~~

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