oj.uz

Submission #164499

# Submission time Handle Problem Language Result Execution time Memory
164499 2019-11-21T07:14:39 Z balbit Dango Maker (JOI18_dango_maker) C++14
33 / 100
 547 ms 262144 KB 
#include <bits/stdc++.h>
using namespace std;
#define pii pair<int,int>
#define ll long long
#define f first
#define s second
#define FOR(i,a,b) for (int i = a; i<b; i++)
#define REP(i,n) FOR(i,0,n)
#define RREP(i,n) for (int i = n-1; i>=0; i--)
#define SZ(x) (int)(x.size())
#define ALL(x) x.begin(),x.end()
#define MX(a,b) a = max(a,(__typeof__(a))(b))
#define MN(a,b) a = min(a,(__typeof__(a))(b))
#define pb push_back
#ifdef BALBIT
#define IOS()
#define bug(x) cerr<<__LINE__<<' '<<#x<<": "<<x<<endl
#else
#define IOS() ios::sync_with_stdio(0),cin.tie(0)
#define endl '\n'
#define bug(x)
#endif

const ll mod = 1e9+7;
const int maxn = 3e3+5;
const ll INF = 0x3f3f3f3f3f3f3f3f;
const int iinf = 0x3f3f3f3f;

struct Dinic{
	struct Edge{
		int to, rev; int cap; int flow = 0;
		Edge(int to, int rev, int cap) : to(to),rev(rev),cap(cap){
			
		}
	};
	int n , S, T;
	vector<vector<Edge> > g;
	vector<int> level;
	vector<int> ptr; 
	Dinic(int n, int S, int T) : n(n), S(S), T(T){
		g.resize(n); level.resize(n); ptr.resize(n);
	}
	void add(int v, int u, int cap){
		g[v].pb({u,SZ(g[u]), cap});
		g[u].pb({v,SZ(g[v])-1, 0});
	}
	
	bool bfs(){
		fill(ALL(level), -1);
		level[S]=0;
		queue<int> q ({S});
		while (level[T]==-1 && !q.empty() ){
			int v = q.front(); q.pop();
			for (Edge &e : g[v]){
				if(e.cap-e.flow > 0 && level[e.to] == -1){
					level[e.to] = level[v]+1; 
					q.push(e.to);
				}
			}
		}
		return level[T]!=-1;
	}
	
	int dfs(int v, int amt){
		if(amt == 0 || v== T) return amt;
		for(; ptr[v] < SZ(g[v]); ptr[v]++){
			Edge &e = g[v][ptr[v]];
			if (level[e.to]!=level[v]+1) continue;
			int mo = dfs(e.to, min(amt,e.cap-e.flow));
			if (mo !=0 ) {
				e.flow += mo;
				g[e.to][e.rev].flow -= mo;
				return mo;
			}
		}
		return 0;
	}
	
	int mf(){
		int re = 0;
		while (bfs()){
			fill(ALL(ptr),0);
			while(int amt = dfs(S,iinf)) {
				re += amt;
			}
		}
		return re;
	}
	
};

char grd[maxn][maxn];
bool up[maxn][maxn]; // Can this g go up?
bool rt[maxn][maxn]; // Can this g go right?
int idup[maxn][maxn];
int idrt[maxn][maxn];


signed main(){
	IOS();
	int n, m; cin>>n>>m;
	REP(i,n) REP(j,m) cin>>grd[i][j];
	int nup = 0, nrt = 0;
	REP(i,n)REP(j,m){
		if(grd[i][j]=='G'){
			up[i][j] = (i && i!=n-1 && grd[i-1][j] == 'R' && grd[i+1][j]=='W' );
			rt[i][j] = (j && j!=m-1 && grd[i][j-1] == 'R' && grd[i][j+1]=='W' );
			idup[i][j] = nup; idrt[i][j] = nrt;
			nup += up[i][j]; 
			nrt += rt[i][j]; 
		}
	}
	int N = nup + nrt + 5; int S = N-1, T = N-2;
	Dinic dd (N,S,T);
	REP(i,n) REP(j,m){
		if(up[i][j]){
//			cout<<i<<' '<<j<<' '<<idup[i][j]<<endl;
			dd.add(S,idup[i][j],1);
			if(rt[i][j] ) {
				dd.add(idup[i][j], idrt[i][j] + nup, iinf);
			}
			if(i && rt[i-1][j+1]){
				dd.add(idup[i][j], idrt[i-1][j+1] + nup, iinf);
			}
			if(j && rt[i+1][j-1]){
				dd.add(idup[i][j], idrt[i+1][j-1] + nup, iinf);
			}
		}
		if(rt[i][j]){
//			cout<<"rt: "<<i<<' '<<j<<' '<<idrt[i][j]<<endl;
			dd.add(idrt[i][j] + nup, T, 1);
		}
	}
//	bug(nup + nrt);
	cout<<nup + nrt - dd.mf() << endl;
	
}

Subtask #1
13.0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 6 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 0 ms 376 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 6 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 0 ms 376 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 420 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 2 ms 504 KB Output is correct
22 Correct 2 ms 504 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 2 ms 504 KB Output is correct
25 Correct 2 ms 504 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 504 KB Output is correct
28 Correct 3 ms 504 KB Output is correct
29 Correct 2 ms 504 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 504 KB Output is correct
32 Correct 2 ms 632 KB Output is correct
33 Correct 2 ms 504 KB Output is correct
34 Correct 2 ms 504 KB Output is correct
35 Correct 2 ms 504 KB Output is correct
36 Correct 2 ms 504 KB Output is correct
37 Correct 2 ms 504 KB Output is correct
38 Correct 2 ms 504 KB Output is correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 2 ms 504 KB Output is correct
41 Correct 2 ms 504 KB Output is correct
42 Correct 2 ms 504 KB Output is correct
43 Correct 2 ms 504 KB Output is correct
44 Correct 2 ms 504 KB Output is correct
45 Correct 2 ms 504 KB Output is correct
46 Correct 2 ms 504 KB Output is correct
47 Correct 2 ms 504 KB Output is correct
48 Correct 2 ms 632 KB Output is correct
49 Correct 2 ms 504 KB Output is correct
50 Correct 2 ms 504 KB Output is correct
51 Correct 2 ms 504 KB Output is correct
52 Correct 2 ms 504 KB Output is correct
53 Correct 2 ms 504 KB Output is correct

Subtask #3
0 / 67.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 376 KB Output is correct
2 Correct 2 ms 376 KB Output is correct
3 Correct 2 ms 376 KB Output is correct
4 Correct 2 ms 376 KB Output is correct
5 Correct 6 ms 376 KB Output is correct
6 Correct 2 ms 504 KB Output is correct
7 Correct 2 ms 376 KB Output is correct
8 Correct 2 ms 504 KB Output is correct
9 Correct 2 ms 376 KB Output is correct
10 Correct 0 ms 376 KB Output is correct
11 Correct 2 ms 504 KB Output is correct
12 Correct 2 ms 376 KB Output is correct
13 Correct 2 ms 376 KB Output is correct
14 Correct 2 ms 376 KB Output is correct
15 Correct 2 ms 376 KB Output is correct
16 Correct 2 ms 376 KB Output is correct
17 Correct 2 ms 376 KB Output is correct
18 Correct 2 ms 420 KB Output is correct
19 Correct 2 ms 504 KB Output is correct
20 Correct 2 ms 504 KB Output is correct
21 Correct 2 ms 504 KB Output is correct
22 Correct 2 ms 504 KB Output is correct
23 Correct 2 ms 504 KB Output is correct
24 Correct 2 ms 504 KB Output is correct
25 Correct 2 ms 504 KB Output is correct
26 Correct 2 ms 376 KB Output is correct
27 Correct 2 ms 504 KB Output is correct
28 Correct 3 ms 504 KB Output is correct
29 Correct 2 ms 504 KB Output is correct
30 Correct 2 ms 376 KB Output is correct
31 Correct 2 ms 504 KB Output is correct
32 Correct 2 ms 632 KB Output is correct
33 Correct 2 ms 504 KB Output is correct
34 Correct 2 ms 504 KB Output is correct
35 Correct 2 ms 504 KB Output is correct
36 Correct 2 ms 504 KB Output is correct
37 Correct 2 ms 504 KB Output is correct
38 Correct 2 ms 504 KB Output is correct
39 Correct 2 ms 504 KB Output is correct
40 Correct 2 ms 504 KB Output is correct
41 Correct 2 ms 504 KB Output is correct
42 Correct 2 ms 504 KB Output is correct
43 Correct 2 ms 504 KB Output is correct
44 Correct 2 ms 504 KB Output is correct
45 Correct 2 ms 504 KB Output is correct
46 Correct 2 ms 504 KB Output is correct
47 Correct 2 ms 504 KB Output is correct
48 Correct 2 ms 632 KB Output is correct
49 Correct 2 ms 504 KB Output is correct
50 Correct 2 ms 504 KB Output is correct
51 Correct 2 ms 504 KB Output is correct
52 Correct 2 ms 504 KB Output is correct
53 Correct 2 ms 504 KB Output is correct
54 Correct 2 ms 376 KB Output is correct
55 Correct 25 ms 24696 KB Output is correct
56 Correct 3 ms 764 KB Output is correct
57 Correct 31 ms 34168 KB Output is correct
58 Correct 72 ms 32992 KB Output is correct
59 Correct 538 ms 156164 KB Output is correct
60 Correct 542 ms 156076 KB Output is correct
61 Correct 529 ms 155820 KB Output is correct
62 Correct 2 ms 504 KB Output is correct
63 Correct 547 ms 154184 KB Output is correct
64 Runtime error 392 ms 262144 KB Execution killed with signal 9 (could be triggered by violating memory limits)
65 Halted 0 ms 0 KB -