Submission #345050

#	Time	Username	Problem	Language	Result	Execution time	Memory
345050		limabeans	Zoo (COCI19_zoo)	C++17	110 / 110	66 ms	4716 KiB

zoo

#include <bits/stdc++.h>
using namespace std;

template<typename T>
void out(T x) { cout << x << endl; exit(0); }
#define watch(x) cout << (#x) << " is " << (x) << endl








const int maxn = 1010;


int n, m;
string g[maxn];


bool viz[maxn][maxn];
int cc = 0;

vector<pair<int,int>> moves = { {-1,0}, {1,0}, {0,-1}, {0,1} };


vector<pair<int,int>> qq;

void dfs(int x, int y, char c) {
    if (x<0||y<0||x>=n||y>=m) return;
    if (viz[x][y]) return;
    if (g[x][y]==c) {
	viz[x][y]=true;
	qq.push_back({x,y});
	dfs(x-1,y,c);
	dfs(x+1,y,c);
	dfs(x,y-1,c);
	dfs(x,y+1,c);
    }
}


char other(char c) {
    if (c=='B') return 'T';
    if (c=='T') return 'B';
    assert(false);
}


int main() {
    ios_base::sync_with_stdio(false); cin.tie(0);  cout.tie(0);

    cin>>n>>m;
    for (int i=0; i<n; i++) {
	cin>>g[i];
    }

    
    dfs(0,0,g[0][0]);

    while (qq.size()) {
	cc++;
	vector<pair<int,int>> cur = qq;
	qq.clear();
	char c = g[cur.back().first][cur.back().second];
	
	for (auto p: cur) {
	    int x=p.first; int y=p.second;
	    for (auto mo: moves) {
		int nx = mo.first+x;
		int ny = mo.second+y;
		if (nx>=0 && nx<n && ny>=0 && ny<m && !viz[nx][ny] && g[nx][ny]==other(c)) {
		    dfs(nx,ny,g[nx][ny]);
		}
	    }
	}
    }


    out(cc);
    return 0;
}

• Subtask 1: 45 / 45
• Subtask 2: 65 / 65