Submission #1025923

#	Time	Username	Problem	Language	Result	Execution time	Memory
1025923		hasan2006	Red-blue table (IZhO19_stones)	C++17	100 / 100	24 ms	11100 KiB

stones

#include <bits/stdc++.h>

using namespace std;

#define TL ios::sync_with_stdio(0),cin.tie(0),cout.tie(0);
#define rall(s) s.rbegin(),s.rend()
#define all(s) s.begin(),s.end()
#define pb push_back
#define se second
#define fi first
#define ll long long
#define ld long double
#define YES cout<<"YES\n"
#define Yes cout<<"Yes\n"
#define yes cout<<"yes\n"
#define NO cout<<"NO\n"
#define No cout<<"No\n"
#define no cout<<"no\n"


const int N = 1e3 + 9 , mod = 1e9 + 7;
int a[N][N] , b[N] , dp[N] , c[N] , d[N][N] , ans[N][N] ;


int solve(ll n , ll m)
{
    ll  q , i , j ,l ,r , x , y , s = 0 , f , k ,  mn = 1e18, mx = 0 ;
    for(i = 1; i <= n; i++)
        for(j = 1; j <= m; j++)
            a[i][j] = 0 ,b[i] = 0 ,  c[j] = n;
    pair<ll,ll> ans = {m , 0};
    x = 1;
    s = m;
    for(i = 1; i <= n; i++){
        for(j = 1; j <= m / 2+ 1; j ++){
            if(--c[x] <= n / 2)
                s--;
            x++;
            if(x == m + 1)
                x = 1;
        }
        ans = max(ans , {i + s ,i});
    }
    x = 1;
    for(i = 1; i <= ans.se; i++){
        for(j = 1; j <= m / 2 + 1; j++){
            a[i][x] = 1;
            x ++;
            if(x == m + 1)
                x = 1;
        }
    }
    return ans.fi;
}

int main(){
    TL;
    int t = 1;
    cin>>t;
    while(t--)
     {
        ll n , m;
        cin>>n>>m;
        ll s = solve(n , m);
        for(int i = 1; i <= n; i++)
            for(int j = 1; j <= m; j++)
            ans[i][j] = 1 - a[i][j];
        ll f = solve(m , n);
        if(f >= s){
            s = f;
            for(int i = 1; i <= n; i++)
                for(int j = 1; j <= m; j++)
                    ans[i][j] = a[j][i];
        }
        cout<<s<<"\n";
        for(int i = 1; i <= n; i++){
            for(int j = 1; j <= m; j++)
            cout<<(ans[i][j] == 1 ? "-" : "+");
        cout<<"\n";
        }
     }
}
// Author : حسن

Compilation message (stderr)

stones.cpp: In function 'int solve(long long int, long long int)':
stones.cpp:27:9: warning: unused variable 'q' [-Wunused-variable]
   27 |     ll  q , i , j ,l ,r , x , y , s = 0 , f , k ,  mn = 1e18, mx = 0 ;
      |         ^
stones.cpp:27:20: warning: unused variable 'l' [-Wunused-variable]
   27 |     ll  q , i , j ,l ,r , x , y , s = 0 , f , k ,  mn = 1e18, mx = 0 ;
      |                    ^
stones.cpp:27:23: warning: unused variable 'r' [-Wunused-variable]
   27 |     ll  q , i , j ,l ,r , x , y , s = 0 , f , k ,  mn = 1e18, mx = 0 ;
      |                       ^
stones.cpp:27:31: warning: unused variable 'y' [-Wunused-variable]
   27 |     ll  q , i , j ,l ,r , x , y , s = 0 , f , k ,  mn = 1e18, mx = 0 ;
      |                               ^
stones.cpp:27:43: warning: unused variable 'f' [-Wunused-variable]
   27 |     ll  q , i , j ,l ,r , x , y , s = 0 , f , k ,  mn = 1e18, mx = 0 ;
      |                                           ^
stones.cpp:27:47: warning: unused variable 'k' [-Wunused-variable]
   27 |     ll  q , i , j ,l ,r , x , y , s = 0 , f , k ,  mn = 1e18, mx = 0 ;
      |                                               ^
stones.cpp:27:52: warning: unused variable 'mn' [-Wunused-variable]
   27 |     ll  q , i , j ,l ,r , x , y , s = 0 , f , k ,  mn = 1e18, mx = 0 ;
      |                                                    ^~
stones.cpp:27:63: warning: unused variable 'mx' [-Wunused-variable]
   27 |     ll  q , i , j ,l ,r , x , y , s = 0 , f , k ,  mn = 1e18, mx = 0 ;
      |                                                               ^~

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