Submission #1228799

#TimeUsernameProblemLanguageResultExecution timeMemory
1228799ByeWorldRed-blue table (IZhO19_stones)C++20
0 / 100
26 ms1608 KiB
#include <bits/stdc++.h>
#pragma GCC optimize("O3")
#define int long long
#define ll long long
#define se second
#define fi first
#define pb push_back
#define lf (id<<1)
#define rg ((id<<1)|1)
#define md ((l+r)>>1)
using namespace std;
typedef pair<int,int> pii;
typedef pair<pii,pii> ipii;
const int MAXN = 2e5+10;
const int SQRT = 450;
const int INF = 2e9;
const int MOD = 998244353;
const int LOG = 20;
int sum(int a, int b){ return (a+MOD+b)%MOD; }
void chsum(int &a, int b){ a = (a+MOD+b)%MOD; }
int mul(int a, int b){ return (a*b)%MOD; }
void chmul(int &a, int b){ a = (a*b)%MOD; }
void chmn(auto &a, auto b){ a = min(a, b); }
void chmx(auto &a, auto b){ a = max(a, b); }

int n, m;
bool sw;
bool ans[1010][1010], b[1010][1010]; // 0 blue col, 1 red row

signed main(){
	// ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
	int T; cin>>T;
	while(T--){
		cin>>n>>m;
		for(int i=1; i<=n; i++)
			for(int j=1; j<=m; j++) ans[i][j] = b[i][j] = 0;
		if(n > m) sw = 1, swap(n, m);
		else sw = 0;

		if(n%2){
			for(int i=1; i<=n/2; i++)
				for(int j=1; j<=m; j++) ans[i][j] = 1;
		}
		
		if(sw){
			for(int i=1; i<=n; i++)
				for(int j=1; j<=m; j++)
					b[j][i] = 1-ans[i][j];

			for(int i=1; i<=m; i++)
				for(int j=1; j<=n; j++)
					ans[i][j] = b[i][j];
			swap(n, m);
		}

		int all = 0;
		for(int i=1; i<=n; i++){
			int tot = 0;
			for(int j=1; j<=m; j++){
				if(ans[i][j]) tot++;
			}
			if(tot > m/2) all++;
		}
		for(int j=1; j<=m; j++){
			int tot = 0;
			for(int i=1; i<=n; i++){
				if(ans[i][j]==0) tot++;
			}
			if(tot > n/2) all++;
		}

		cout << all << '\n';
		for(int i=1; i<=n; i++){
			for(int j=1; j<=m; j++){
				cout << (ans[i][j] ? '+' : '-');
			}
			cout << '\n';
		}
		for(int i=1; i<=n; i++)
			for(int j=1; j<=m; j++) ans[i][j] = b[i][j] = 0;
	}
}
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