oj.uz

Submission #354261

# Submission time Handle Problem Language Result Execution time Memory
354261 2021-01-21T16:00:56 Z ryansee Comparing Plants (IOI20_plants) C++14
25 / 100
 675 ms 4460 KB 
#include "plants.h"
 
#include "bits/stdc++.h"
using namespace std;
 
#define FAST ios_base::sync_with_stdio(false); cin.tie(0);
#define pb push_back
#define eb emplace_back
#define ins insert
#define f first
#define s second
#define cbr cerr<<"hi\n"
#define mmst(x, v) memset((x), v, sizeof ((x)))
#define siz(x) ll(x.size())
#define all(x) (x).begin(), (x).end()
#define lbd(x,y) (lower_bound(all(x),y)-x.begin())
#define ubd(x,y) (upper_bound(all(x),y)-x.begin())
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());    //can be used by calling rng() or shuffle(A, A+n, rng)
inline long long rand(long long x, long long y) { return rng() % (y+1-x) + x; } //inclusivesss
string inline to_string(char c) {string s(1,c);return s;} template<typename T> inline T gcd(T a,T b){ return a==0?llabs(b):gcd(b%a,a); }
 
using ll=long long; 
using ld=long double;
#define FOR(i,s,e) for(ll i=s;i<=ll(e);++i)
#define DEC(i,s,e) for(ll i=s;i>=ll(e);--i)
using pi=pair<ll,ll>; using spi=pair<ll,pi>; using dpi=pair<pi,pi>; 
 
long long LLINF = 1e18;
int INF = 1e9+1e6;
#define MAXN (5002)
 
int n, start, k;
ll A[MAXN];
bitset<MAXN> gone;
inline ll cy(ll x) {
	x %= n, x += n, x %= n; return x;
}
vector<int> v[MAXN];
bitset<MAXN> reach[MAXN];

void init(int K, std::vector<int> r) { k=K;
	n=r.size(); if(n>5000) return;
	
	while(1) {
		start = -1;
		FOR(i,0,n-1) if(!gone[i] && r[i] == 0) {
			DEC(jj,i-1,i-k+1) {
				int j = (jj + n) % n;
				if(!gone[j] && r[j] == 0) goto no;
			}
			start = i;
			break;
			no:;
		}
		if(start == -1) break;
		
		FOR(i,start+1,start+k-1) if(!gone[i%n]) {
			A[i%n]=max(A[i%n], A[start]+1);
		}
		
		DEC(i,start-1,start-k+1) if(!gone[(i+n)%n]) {
			A[(i+n)%n] = max(A[(i+n)%n], A[start]+1), -- r[(i+n)%n];
		}
		gone[start] = 1;
	}
	// FOR(i,0,n-1) assert(r[i]==0);
	
	if(n <= 300) {
		FOR(i,0,n-1) {
			ll sm = -LLINF, pos=-1;
			FOR(jj,i+1,i+k-1) { int j=cy(jj);
				if(A[i] < A[j]) {
					if(A[j] < sm) sm = A[j], pos = j;
					v[i].eb(j);
				} else {
					v[j].eb(i);
				}
			}
			if(~pos) v[i].eb(pos);
		}
		function<void(ll,ll)>dfs=[&](ll x,ll o){
			if(reach[o][x]) return;
			reach[o][x]=1;
			for(auto i:v[x]) dfs(i, o);
		};
		FOR(i,0,n-1) dfs(i, i);
	}
}
int compare_plants(int x, int y) {
	if(n > 5000) return 0;
	if(min(y-x, n-y+x) < k || n > 300 || reach[x][y] || reach[y][x]) return A[x] < A[y] ? 1 : -1;
	else return 0;
}

Subtask #1
0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 640 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 62 ms 3308 KB Output is correct
7 Incorrect 73 ms 3308 KB Output isn't correct
8 Halted 0 ms 0 KB -

Subtask #2
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 3 ms 620 KB Output is correct
6 Correct 20 ms 492 KB Output is correct
7 Correct 555 ms 3380 KB Output is correct
8 Correct 4 ms 620 KB Output is correct
9 Correct 20 ms 492 KB Output is correct
10 Correct 534 ms 3436 KB Output is correct
11 Correct 285 ms 3320 KB Output is correct
12 Correct 307 ms 3448 KB Output is correct
13 Correct 675 ms 3564 KB Output is correct

Subtask #3
0 / 13.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 3 ms 620 KB Output is correct
6 Correct 20 ms 492 KB Output is correct
7 Correct 555 ms 3380 KB Output is correct
8 Correct 4 ms 620 KB Output is correct
9 Correct 20 ms 492 KB Output is correct
10 Correct 534 ms 3436 KB Output is correct
11 Correct 285 ms 3320 KB Output is correct
12 Correct 307 ms 3448 KB Output is correct
13 Correct 675 ms 3564 KB Output is correct
14 Incorrect 72 ms 3516 KB Output isn't correct
15 Halted 0 ms 0 KB -

Subtask #4
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 66 ms 3380 KB Output is correct
4 Incorrect 86 ms 4460 KB Output isn't correct
5 Halted 0 ms 0 KB -

Subtask #5
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 2 ms 620 KB Output is correct
7 Correct 15 ms 1260 KB Output is correct
8 Correct 36 ms 1516 KB Output is correct
9 Correct 17 ms 1260 KB Output is correct
10 Correct 36 ms 1516 KB Output is correct
11 Correct 15 ms 1260 KB Output is correct
12 Correct 18 ms 1260 KB Output is correct
13 Correct 75 ms 1900 KB Output is correct

Subtask #6
0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 492 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Incorrect 6 ms 492 KB Output isn't correct
6 Halted 0 ms 0 KB -

Subtask #7
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 492 KB Output is correct
2 Correct 1 ms 640 KB Output is correct
3 Correct 1 ms 492 KB Output is correct
4 Correct 1 ms 492 KB Output is correct
5 Correct 1 ms 492 KB Output is correct
6 Correct 62 ms 3308 KB Output is correct
7 Incorrect 73 ms 3308 KB Output isn't correct
8 Halted 0 ms 0 KB -