Submission #673324

#	Time	Username	Problem	Language	Result	Execution time	Memory
673324		Baytoro	Red-blue table (IZhO19_stones)	C++17	27 / 100	23 ms	1412 KiB

stones

#include <bits/stdc++.h>
using namespace std;
#define ios ios::sync_with_stdio(false); cin.tie(NULL);
#define pb push_back
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define fr first
#define sc second
#define int long long
#define endl '\n'
#define cnt(x) __builtin_popcount(x)
void fopn(string name){
	freopen((name+".in").c_str(),"r",stdin);
	freopen((name+".out").c_str(),"w",stdout);
}
const int INF=1e18,mod=998244353;
int n,m;
char ar[1005][1005];
void solve(){
	cin>>n>>m;
	
	int swaped=0;
	if(n>m){
		swap(n,m);
		swaped=1;
	}
	for(int i=1;i<=n;i++){
		for(int j=1;j<=m;j++){
			if(swaped)
				ar[i][j]='+';
			else
				ar[i][j]='-';
		}
			
	}
	cout<<m+min(n,(n/2-!(n%2)*m/(m/2+1)))<<endl;
	for(int i=1,k=1;i<=min(n,n/2-!(n%2)*m/(m/2+1));i++){
		for(int j=1;j<=m/2+1;j++,k++){
			if(k==m+1) k=1;
			if(swaped)
				ar[i][k]='-';
			else
				ar[i][k]='+';
		}
	}
	if(!swaped)
		for(int i=1;i<=n;i++){
			for(int j=1;j<=m;j++)
				cout<<ar[i][j];
			cout<<endl;
		}
	else
		for(int i=1;i<=m;i++){
			for(int j=1;j<=n;j++)
				cout<<ar[j][i];
			cout<<endl;
		}
}
main(){
	//fopn("newbarn");
	ios;
	int T=1;
	cin>>T;
	while(T--){
		solve();
	}
}

Compilation message (stderr)

stones.cpp:59:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   59 | main(){
      | ^~~~
stones.cpp: In function 'void fopn(std::string)':
stones.cpp:13:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   13 |  freopen((name+".in").c_str(),"r",stdin);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stones.cpp:14:9: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   14 |  freopen((name+".out").c_str(),"w",stdout);
      |  ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
stones.cpp: In function 'void solve()':
stones.cpp:41:12: warning: writing 1 byte into a region of size 0 [-Wstringop-overflow=]
   41 |     ar[i][k]='-';
      |     ~~~~~~~^
stones.cpp:18:6: note: at offset 0 to object 'ar' with size 1010025 declared here
   18 | char ar[1005][1005];
      |      ^~

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