Submission #672427

#	Time	Username	Problem	Language	Result	Execution time	Memory
672427		Alihan_8	Red-blue table (IZhO19_stones)	C++17	27 / 100	22 ms	1232 KiB

stones

#include <bits/stdc++.h>
// include <ext/pb_ds/assoc_container.hpp>
// include <ext/pb_ds/tree_policy.hpp>
// using namespace __gnu_pbds;
using namespace std;
#define all(x) x.begin(), x.end()
#define pb push_back
// define ordered_set tree<int,null_type,less_equal<int>,rb_tree_tag,tree_order_statistics_node_update>
#define mpr make_pair
#define ln '\n'
void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
#define int long long
signed main(){
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);

    int T; cin >> T;
    while ( T-- ){
        int n, m; cin >> n >> m;
        cout << max(n, m)+(min(n, m)-1)/2 << ln;
        if ( n >= m ){
            for ( int i = 0; i < n; i++ ){
                for ( int j = 0; j < m; j++ ){
                    if ( j <= m/2 ) cout << '+';
                    else cout << '-';
                }
                cout << ln;
            }
        }
        else{
            for ( int i = 0; i < n; i++ ){
                for ( int j = 0; j < m; j++ ){
                    if ( i <= n/2 ) cout << '-';
                    else cout << '+';
                }
                cout << ln;
            }
        }
    }

    cout << '\n';
}

Compilation message (stderr)

stones.cpp: In function 'void IO(std::string)':
stones.cpp:11:29: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                      ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stones.cpp:11:70: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | void IO(string name){freopen((name+".in").c_str(),"r",stdin); freopen((name+".out").c_str(),"w",stdout);}
      |                                                               ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

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