Submission #1025294

#	Time	Username	Problem	Language	Result	Execution time	Memory
1025294		hasan2006	Red-blue table (IZhO19_stones)	C++17	38 / 100	28 ms	4944 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]  ;


void solve()
{
    ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
    cin>>n>>m;
    ll N = n, M = m;
    if(n < m)
        swap(n , m);
    for(i = 1; i <= n; i++)
        for(j = 1; j <= m; j++)
            a[i][j] = 0 ,b[i] = m ,  c[j] = 0;
    f =  n / 2 + 1;
    x = m / 2 - (m % 2 == 0) , y = 1;
    for(i = 1; i <= n; i++){
        for(j = y; j < y + x; j++)
            a[i][j] = 1 , c[j]++ , b[i]--;
        if(c[y] >= f)
            y = y + x;
    }
    k = 1;
    x = min(m - y + 1 , x);
    while((f - c[y] < x) && k + (f - c[y] - 1) <= n && (y + x - 1) <= m){
        for(i = k; i < i + f - c[y]; i++)
            for(j = y ; j < y + x; j++)
                a[i][j] = 1 , b[i]-- , c[j]++;
        i = i + f - c[y];
        y = y + x;
    }
    for(i = 1; i <= n; i++)
        s += (b[i] > m / 2);
    for(i = 1; i <= m; i++)
        s += (c[i] > n / 2);
    cout<<s<<"\n";
    for(i = 1; i <= N; i++){
        for(j = 1; j <= M; j++){
            x = (N < M ? a[j][i] : 1 - a[i][j]);
            cout<<(x == 1 ? "+"  : "-");
        }
        cout<<"\n";
    }
}

int main(){
    TL;
    int t = 1;
    cin>>t;
    while(t--)
     {
        solve();
     }
}
// Author : حسن

Compilation message (stderr)

stones.cpp: In function 'void solve()':
stones.cpp:27:12: warning: unused variable 'q' [-Wunused-variable]
   27 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |            ^
stones.cpp:27:23: warning: unused variable 'l' [-Wunused-variable]
   27 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                       ^
stones.cpp:27:26: warning: unused variable 'r' [-Wunused-variable]
   27 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                          ^
stones.cpp:27:58: warning: unused variable 'mn' [-Wunused-variable]
   27 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                                                          ^~
stones.cpp:27:69: warning: unused variable 'mx' [-Wunused-variable]
   27 |     ll n , q , i , j ,l ,r , x , y , s = 0 , f , k , m , mn = 1e18, mx = 0 ;
      |                                                                     ^~

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