Submission #868493

#	Time	Username	Problem	Language	Result	Execution time	Memory
868493		KiaRez	Red-blue table (IZhO19_stones)	C++17	69 / 100	19 ms	4956 KiB

stones

/*
    IN THE NAME OF GOD
*/
#include <bits/stdc++.h>

// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// #pragma GCC optimize("O3")
// #pragma GCC optimize("unroll-loops")

using namespace std;

typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
typedef long double ld;

#define F                                      first
#define S                                      second
#define Mp                                     make_pair
#define pb                                     push_back
#define pf                                     push_front
#define size(x)                                ((ll)x.size())
#define all(x)                                 (x).begin(),(x).end()
#define kill(x)		                           cout << x << '\n', exit(0);
#define fuck(x)                                cout << "(" << #x << " , " << x << ")" << endl
#define endl                                   '\n'

const int N = 3e5+23, lg = 18;
ll Mod = 1e9+7; //998244353;

inline ll MOD(ll a, ll mod=Mod) {a%=mod; (a<0)&&(a+=mod); return a;}
inline ll poww(ll a, ll b, ll mod=Mod) {
    ll ans = 1;
    a=MOD(a, mod);
    while (b) {
        if (b & 1) ans = MOD(ans*a, mod);
        b >>= 1;
        a = MOD(a*a, mod);
    }
    return ans;
}

int t, n, m, x;

void solve44() {
		if(n<=m) {
			cout<<(n-1)/2+m<<endl;
			int x = (n-1)/2;
			for(int i=1; i<=n-x; i++) {
				for(int j=1; j<=m; j++) {
					cout<<'-';
				}
				cout<<endl;
			}
			for(int i=1; i<=x; i++) {
				for(int j=1; j<=m; j++) {
					cout<<"+";
				}
				cout<<endl;
			}
		} else {
			cout<<(m-1)/2+n<<endl;
			int x = (m-1)/2;
			for(int i=1; i<=n; i++) {
				for(int j=1; j<=x; j++) {
					cout<<'-';
				}
				for(int j=1; j<=m-x; j++){
					cout<<'+';
				}
				cout<<endl;
			}
		}

}

int a[1005][1005];
int main () {
	ios_base::sync_with_stdio(false), cin.tie(0);

	cin>>t;
	while(t--) {
		cin>>n>>m;
		for(int i=1; i<=n; i++) fill(a[i], a[i]+m+2, 0);
		if(n<=4 || m<=4) {
			solve44();
		} else if((n==5 || m==5) && (n+m)%2==1) {
			if(n == 5) {
				for(int i=1; i<=2; i++) {
					for(int j=1; j<=m; j++) a[i][j] = -1;
				}
				int x=3, y=1;
				while(y <= m) {
					a[x][y] = -1;
					x++; y++;
					if(x==n+1) x=3;
				}
				cout<<3+m<<endl;
				for(int i=1; i<=n; i++) {
					for(int j=1; j<=m; j++) {
						cout<<(a[i][j] == -1 ? '-' : '+');
					}
					cout<<endl;
				}
			} else {
				for(int i=1; i<=2; i++) {
					for(int j=1; j<=n; j++) a[j][i] = 1;
				}
				int x=1, y=3;
				while(x <= n) {
					a[x][y] = 1;
					x++; y++;
					if(y==m+1) y=3;
				}
				cout<<3+n<<endl;
				for(int i=1; i<=n; i++) {
					for(int j=1; j<=m; j++) {
						cout<<(a[i][j] == 1 ? '+' : '-');
					}
					cout<<endl;
				}
			}
		} else if(m==6 || n==6) {
			if(n == 6) {
				for(int i=1; i<=3; i++) {
					for(int j=1; j<=m; j++) a[i][j] = -1;
				}
				int x=4, y=1;
				while(y <= m) {
					a[x][y] = -1;
					x++; y++;
					if(x==n+1) x=4;
				}
				cout<<3+m<<endl;
				for(int i=1; i<=n; i++) {
					for(int j=1; j<=m; j++) {
						cout<<(a[i][j] == -1 ? '-' : '+');
					}
					cout<<endl;
				}
			} else {
				for(int i=1; i<=3; i++) {
					for(int j=1; j<=n; j++) a[j][i] = 1;
				}
				int x=1, y=4;
				while(x <= n) {
					a[x][y] = 1;
					x++; y++;
					if(y==m+1) y=4;
				}
				cout<<3+n<<endl;
				for(int i=1; i<=n; i++) {
					for(int j=1; j<=m; j++) {
						cout<<(a[i][j] == 1 ? '+' : '-');
					}
					cout<<endl;
				}
			}
			/*for(int i=1; i<=n; i++) {
				for(int j=1; j<=3; j++) a[i][j] = 1;
			}
			int ptr=1, num=(n/2-2), x=1, y=n;
			while(x<=n) {
				int f = num;
				while(f > 0) {
					a[x][y] = 1;
					y--;
					if(y==3) y=n;
					f--;
				}
				x++;
			}
			
			cout<<n+m-3<<endl;
			for(int i=1; i<=n; i++) {
				for(int j=1; j<=m; j++) {
					cout<<(a[i][j] == 1 ? '+' : '-');
				}
				cout<<endl;
			}*/

		} else {
			for(int i=1; i<=n-(n-1)/2; i++) {
				for(int j=1; j<=(m-1)/2; j++) {
					a[i][j] = -1;
				}
			}
			for(int i=(n-1)/2+1; i<=n; i++) {
				for(int j=(m)/2+2; j<=m; j++) {
					a[i][j] = -1;
				}
			}
			cout<<2*((n-1)/2 + (m-1)/2)<<endl;
			for(int i=1; i<=n; i++) {
				for(int j=1; j<=m; j++) {
					cout<<(a[i][j] == -1 ? '-' : '+');
				}
				cout<<endl;
			}
		}
	}

	return 0;
}

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