Submission #1090093

#	Time	Username	Problem	Language	Result	Execution time	Memory
1090093		PieArmy	Red-blue table (IZhO19_stones)	C++17	100 / 100	20 ms	5212 KiB

stones

typedef long long ll;
ll pie(ll army){return (1ll<<army);}
#include <bits/stdc++.h>
#define fr first
#define sc second
#define pb push_back
#define endl '\n'
#define mid ((left+right)>>1)
const ll inf=2000000000000000005;
const int sonsuz=2000000005;
using namespace std;
ll fpow(ll x,ll y,ll m=0){if(y<0){cout<<"powError";return -1;}if(m)x%=m;ll res=1;while(y>0){if(y&1)res*=x;x*=x;if(m){x%=m;res%=m;}y>>=1;}return res;}

void code(){
	bool b=false;
	int n,m;cin>>n>>m;
	if(n>m){
		b=true;
		swap(n,m);
	}
	int table[n][m];
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			table[i][j]=0;
		}
	}
	int bas=0;
	int k=(m/2)+1;
	for(int i=0;i<n;i++){
		for(int j=bas;j<bas+k;j++){
			table[i][j%m]=1;
		}
		bas+=k;
	}
	for(int j=0;j<m;j++){
		int say=0;
		for(int i=0;i<n;i++){
			say+=table[i][j];
			if(say>=(n+1)/2){
				table[i][j]=0;
			}
		}
	}
	int ans=m;
	for(int i=0;i<n;i++){
		int say=0;
		for(int j=0;j<m;j++){
			say+=table[i][j];
		}
		if(say>m/2){
			ans++;
		}
	}
	cout<<ans<<endl;
	if(b){
		swap(n,m);
	}
	for(int i=0;i<n;i++){
		for(int j=0;j<m;j++){
			int x;
			if(b){
				x=table[j][i];
			}
			else x=table[i][j];
			if(x!=b){
				cout<<'+';
			}
			else cout<<'-';
		}
		cout<<endl;
	}
}

int main(){
	ios_base::sync_with_stdio(false);cin.tie(NULL);
	bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
	int t=0;
	if(!t)cin>>t;
	while(t--){code();}
	return 0;
}

Compilation message (stderr)

stones.cpp: In function 'int main()':
stones.cpp:76:32: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |  bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
      |                         ~~~~~~~^~~~~~~~~~~~~~~~~
stones.cpp:76:57: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   76 |  bool usaco=0;if(usaco){freopen(".in","r",stdin);freopen(".out","w",stdout);}
      |                                                  ~~~~~~~^~~~~~~~~~~~~~~~~~~

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