Submission #402656

#	Time	Username	Problem	Language	Result	Execution time	Memory
402656		keta_tsimakuridze	Red-blue table (IZhO19_stones)	C++14	0 / 100	212 ms	1428 KiB

stones

#include<bits/stdc++.h>
#define f first
//#define int long long
#define s second
#define pii pair<int,int>
using namespace std;
const int N=1e3+5,mod=1e9+7;
int t,n,m;
char a[N][N];
set<pii> s;
 main(){
	// t=1;
	cin >> t;
	while(t--){
		cin>>n>>m;
		s.clear();
		for(int i=1;i<=m;i++) s.insert({0,i});
		int B = m;
		int ans = B,cnt=0;
		for(int i=1;i<=n;i++){
			for(int j=1;j<=m;j++) a[i][j]='-';
		}
		for(int i=1;i<=n;i++){
			for(int j=1;j<=m/2+1;j++) {
				pii c = *s.begin();
				s.erase(c);
				s.insert({c.f+1,c.s});
				if(c.f+1==n/2+1) B--;
			}
			if(i+B>ans) ans=i+B,cnt=i;
		}
		cout<<ans<<endl;
		s.clear();
		for(int i=1;i<=m;i++) s.insert({0,i});
		for(int i=1;i<=cnt;i++){
			for(int j=1;j<=m/2+1;j++) {
				pii c = *s.begin();
				s.erase(c);
				s.insert({c.f+1,c.s}); a[i][c.s] = '+';
				if(c.f+1==n/2+1) B--;
			}
		
		
		}	
		for(int i=1;i<=n;i++){
		
		for(int j=1;j<=m;j++) 
		cout<<a[i][j];
		cout<<endl;
		}
	}
}

Compilation message (stderr)

stones.cpp:11:2: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   11 |  main(){
      |  ^~~~

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