oj.uz

Submission #236536

# Submission time Handle Problem Language Result Execution time Memory
236536 2020-06-02T12:50:51 Z kshitij_sodani Red-blue table (IZhO19_stones) C++17
100 / 100
 109 ms 5248 KB 
#include <bits/stdc++.h>
using namespace std;
typedef int64_t llo;
#define mp make_pair
#define pb push_back
#define a first
#define b second
int n,m,t;
int main(){
	ios_base::sync_with_stdio(false);
	cin.tie(NULL);
	cin>>t;
	while(t--){
		cin>>n>>m;
		if(n==1){
			cout<<m<<endl;
			for(int j=0;j<m;j++){
				cout<<"-";
			}
			cout<<endl;
		}
		else if(m==1){
			cout<<n<<endl;
			for(int j=0;j<n;j++){
				cout<<"+"<<endl;
			}
			cout<<endl;
		}
		else if(n==2){
			cout<<m<<endl;
			for(int i=0;i<m;i++){
				cout<<"-";
			}
			cout<<endl;
			for(int i=0;i<m;i++){
				cout<<"-";
			}
			cout<<endl;
		}
		else if(m==2){
			cout<<n<<endl;
			for(int i=0;i<n;i++){
				cout<<"++"<<endl;
			}
		}
		else if(n==3){
			cout<<(m+1)<<endl;
			for(int i=0;i<m;i++){
				cout<<"-";
			}
			cout<<endl;
			for(int i=0;i<m;i++){
				cout<<"+";
			}
			cout<<endl;
			for(int i=0;i<m;i++){
				cout<<"-";
			}
			cout<<endl;
		}
		else if(m==3){
			cout<<(n+1)<<endl;
			for(int i=0;i<n;i++){
				cout<<"+-+"<<endl;
			}
		}
		else if(n==4){
			cout<<m+1<<endl;
			for(int j=0;j<3;j++){
				for(int i=0;i<m;i++){
					cout<<"-";
				}
				cout<<endl;
			}
			for(int i=0;i<m;i++){
					cout<<"+";
				}
				cout<<endl;

		}
		else if(m==4){
			cout<<n+1<<endl;
			for(int i=0;i<n;i++){
				cout<<"+++-"<<endl;
			}
		}
		/*else if(m%2==1 and n%2==1){
			if(m+3+(n-5)/2>n+3+(m-5)/2){
				cout<<(m+3+(n-5)/2)<<endl;
				int it[n][m];
				for(int i=0;i<n;i++){
					for(int j=0;j<m;j++){
						it[i][j]=0;
					}
				}
				for(int i=0;i<(m+2)/2;i++){
					it[0][i]=1;
				}
				for(int i=m-(m+2)/2;i<m;i++){
					it[1][i]=1;
				}
				for(int j=0;j<m;j++){
					if(it[0][j]!=1 or it[1][j]!=1){
						it[2][j]=1;
					}
				}
				for(int i=5;i<n;i+=2){
					for(int j=0;j<m;j++){
						it[i][j]=1;
					}
				}
				for(int i=0;i<n;i++){
					for(int j=0;j<m;j++){
						if(it[i][j]==1){
							cout<<"+";
						}
						else{
							cout<<"-";
						}
					}
					cout<<endl;
				}
			}
			else{
				cout<<(n+3+(m-5)/2)<<endl;
				int it[n][m];
				for(int i=0;i<n;i++){
					for(int j=0;j<m;j++){
						it[i][j]=0;
					}
				}
				for(int i=0;i<(n+2)/2;i++){
					it[i][0]=1;
				}
				for(int i=n-(n+2)/2;i<n;i++){
					it[i][1]=1;
				}
				for(int j=0;j<n;j++){
					if(it[j][0]!=1 or it[j][1]!=1){
						it[j][2]=1;
					}
				}
				for(int j=5;j<m;j+=2){
					for(int i=0;i<n;i++){
						it[i][j]=1;
			//			cout<<i<<","<<j<<endl;
					}
				}
				for(int i=0;i<n;i++){
					for(int j=0;j<m;j++){
						if(it[i][j]==1){
							cout<<"-";
						}
						else{
							cout<<"+";
						}
					}
					cout<<endl;
				}
			}
		}*/
		else if(n==5){
			cout<<(m+3+(n-5)/2)<<endl;
			int it[n][m];
			for(int i=0;i<n;i++){
				for(int j=0;j<m;j++){
					it[i][j]=0;
				}
			}
			for(int i=0;i<(m+2)/2;i++){
				it[0][i]=1;
			}
			for(int i=m-(m+2)/2;i<m;i++){
				it[1][i]=1;
			}
			for(int j=0;j<m;j++){
				if(it[0][j]!=1 or it[1][j]!=1){
					it[2][j]=1;
				}
			}
			for(int i=5;i<n;i+=2){
				for(int j=0;j<m;j++){
					it[i][j]=1;
				}
			}
			for(int i=0;i<n;i++){
				for(int j=0;j<m;j++){
					if(it[i][j]==1){
						cout<<"+";
					}
					else{
						cout<<"-";
					}
				}
				cout<<endl;
			}
		}
		else if(m==5){

			cout<<(n+3)<<endl;
			int it[n][m];
			for(int i=0;i<n;i++){
				for(int j=0;j<m;j++){
					it[i][j]=0;
				}
			}
			for(int i=0;i<(n+2)/2;i++){
				it[i][0]=1;
			}
			for(int i=n-(n+2)/2;i<n;i++){
				it[i][1]=1;
			}
			for(int j=0;j<n;j++){
				if(it[j][0]!=1 or it[j][1]!=1){
					it[j][2]=1;
				}
			}
			for(int i=0;i<n;i++){
				for(int j=0;j<m;j++){
					if(it[i][j]==1){
						cout<<"-";
					}
					else{
						cout<<"+";
					}
				}
				cout<<endl;
			}
		}
		else if(m==n){
			if(m==6){
				cout<<9<<endl;
				cout<<"++++--"<<endl;
				cout<<"--++++"<<endl;
				cout<<"++--++"<<endl;
				cout<<"------"<<endl;
				cout<<"------"<<endl;
				cout<<"------"<<endl;
				continue;
			}
			int it[n][m];
			for(int i=0;i<n;i++){
				for(int j=0;j<m;j++){
					it[i][j]=0;
				}
			}
			if(m%2==1 and n%2==1){
				cout<<(4*(m/2))<<endl;
				for(int i=0;i<(m+1)/2;i++){
					for(int j=0;j<(n)/2;j++){
						it[j][i]=1;
					}
				}
				for(int i=0;i<(m+1)/2;i++){
					for(int j=0;j<(n)/2;j++){
						it[n-j-1][m-i-1]=1;
					}
				}
				for(int i=0;i<n;i++){
					for(int j=0;j<m;j++){
						if(it[i][j]==1){
							cout<<"+";
						}
						else{
							cout<<"-";
						}
					}
					cout<<endl;
				}
			}
			else{
				cout<<(4*(n/2-1))<<endl;
				for(int i=0;i<(m+2)/2;i++){
					for(int j=0;j<(n-1)/2;j++){
						it[j][i]=1;
					}
				}
				for(int i=0;i<(m+2)/2;i++){
					for(int j=0;j<(n-1)/2;j++){
						it[n-j-1][m-i-1]=1;
					}
				}
				for(int i=0;i<n;i++){
					for(int j=0;j<m;j++){
						if(it[i][j]==1){
							cout<<"+";
						}
						else{
							cout<<"-";
						}
					}
					cout<<endl;
				}

			}
		}
		else{
			int k=(n+2)/2;
			int l=(m+2)/2;
			int ma=-1;
			pair<int,int> aa={-1,-1};
			int bb=m;
			for(int i=0;i<=n;i++){
				for(int j=0;j<=m;j++){
					if(i*l+j*k<=n*m){
						int le2=m-j;
						int st=1;
						if(l>le2){
							if((l-le2)*i>(n-k)*(j)){
								st=0;
							}
						}
						if(st){
							if(i+j>ma){
								ma=i+j;
								aa={i,j};
							}
						}
					}
				}
				/*if(i+bb>=ma){
					ma=i+bb;
					aa={i,bb};
				}*/
			}
			if(aa.b<0){
				while(true){
					continue;
				}
			}
			int it[n][m];
			for(int i=0;i<n;i++){
				for(int j=0;j<m;j++){
					it[i][j]=0;
				}
			}
			int le=m-aa.b;
			/*if(ma==34){
				return 0;
			}*/
			//cout<<ma<<endl;
			deque<int> freq[1001];
			int ind=0;
			for(int i=0;i<1001;i++){
				freq[i].clear();
			}
			for(int i=le;i<m;i++){
				freq[0].pb(i);
			}
			//(m-le)
			//cout<<aa.a<<","<<aa.b<<endl;
			int vis[1001];
			for(int i=0;i<1001;i++){
				vis[i]=0;
			}
			int cot[1001];
			for(int i=0;i<1001;i++){
				cot[i]=0;
			}
			for(int i=0;i<aa.a;i++){
				vector<int> kk;
				for(int j=0;j<l;j++){
					if(j<le){
						it[i][j]=1;
						continue;
					}
					if(freq[ind].size()==0){
						ind+=1;
					}
				/*	if(ind>=(m-1)/2){
						while(true){
							continue;
						}
					}*/
					it[i][freq[ind].back()]=1;
				//	cout<<i<<":"<<freq[ind].back()<<endl;
					int xx=freq[ind].back();
					kk.pb(xx);
				
					vis[xx]=1;
					cot[xx]+=1;
				/*	if(ind>=(n-1)/2){
						while(true){
							continue;
						}
					}*/
					freq[ind+1].push_front(xx);
					freq[ind].pop_back();
				}
				for(auto j:kk){
					vis[j]=0;
				}
			}
			int coo=0;
			for(int i=0;i<m;i++){
				int co=0;
				for(int j=0;j<n;j++){
					if(it[j][i]==0){
						co+=1;
					}
				}
				if(co>=k){
					coo+=1;

				}
			
			}
		
			cout<<ma<<endl;
		//	cout<<coo+aa.a<<endl;
			for(int i=0;i<n;i++){
				for(int j=0;j<m;j++){
					if(it[i][j]==1){
						cout<<"+";
					}
					else{
						cout<<"-";
					}
				}
				cout<<endl;
			}


		}

		/*int it[n][m];
			if(n>m){
				int l=0;
				for(int i=0;i<n;i++){
					for(int j=l;j<l+(m+2)/2;j++){
						it[i][j%m]=1;
					}
					l=l+(m+2)/2;
					l%=m;
				}
				for(int i=0;i<n;i++){
					for(int j=0;j<m;j++){
						if(it[i][j]){
							cout<<"+";
						}
						else{
							cout<<"-";
						}
					}
					cout<<endl;
				}
			}
			else{
				for(int i=0;i<n;i++){
					for(int j=0;j<m;j++){
						if(i%2==0){
							cout<<"-";
						}
						else{
							cout<<"+";
						}
					}
					cout<<endl;
				}
			}*/
		
	}


	return 0;
}

Compilation message

stones.cpp: In function 'int main()':
stones.cpp:302:8: warning: unused variable 'bb' [-Wunused-variable]
    int bb=m;
        ^~
stones.cpp:352:8: warning: variable 'vis' set but not used [-Wunused-but-set-variable]
    int vis[1001];
        ^~~

Subtask #1
17.0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct

Subtask #2
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 13 ms 384 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 13 ms 384 KB Output is correct
4 Correct 23 ms 384 KB Output is correct

Subtask #4
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 109 ms 2056 KB Output is correct
2 Correct 41 ms 4484 KB Output is correct
3 Correct 40 ms 4856 KB Output is correct

Subtask #5
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 50 ms 1400 KB Output is correct
2 Correct 33 ms 3192 KB Output is correct
3 Correct 29 ms 2432 KB Output is correct

Subtask #6
31.0 / 31.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 384 KB Output is correct
2 Correct 5 ms 384 KB Output is correct
3 Correct 13 ms 384 KB Output is correct
4 Correct 23 ms 384 KB Output is correct
5 Correct 109 ms 2056 KB Output is correct
6 Correct 41 ms 4484 KB Output is correct
7 Correct 40 ms 4856 KB Output is correct
8 Correct 50 ms 1400 KB Output is correct
9 Correct 33 ms 3192 KB Output is correct
10 Correct 29 ms 2432 KB Output is correct
11 Correct 82 ms 1324 KB Output is correct
12 Correct 39 ms 3584 KB Output is correct
13 Correct 42 ms 3076 KB Output is correct
14 Correct 34 ms 2368 KB Output is correct
15 Correct 34 ms 5248 KB Output is correct
16 Correct 33 ms 4728 KB Output is correct
17 Correct 18 ms 2688 KB Output is correct