oj.uz

Submission #405988

# Submission time Handle Problem Language Result Execution time Memory
405988 2021-05-17T06:08:59 Z amunduzbaev Swapping Cities (APIO20_swap) C++14
13 / 100
 138 ms 14940 KB 
#include "swap.h"
#include "bits/stdc++.h"
using namespace std;
#define pb push_back
#define ff first
#define ss second
#define sz(x) (int)x.size()
#define int long long
template<class T> bool umin(T& a, const T b) { if(a > b) { a = b; return 1; } return 0; }
template<class T> bool umax(T& a, const T b) { if(a < b) { a = b; return 1; } return 0; }

const int NN = 1e5+5;
int mx = 0, ok, res, d[NN], n, m;
vector<pair<int, int>> edges[NN];
vector<pair<int, int>> mm;

void init(int32_t N, int32_t M,
	vector<int32_t> a, vector<int32_t> b, vector<int32_t> c) {
	n = N, m = M;
	for(int i=0;i<m;i++){
		edges[a[i]].pb({b[i], c[i]});
		edges[b[i]].pb({a[i], c[i]});
		mx = max(mx, (int)c[i]);
	}
	
	if(n == m) { ok = -1, res = mx; }
	else if(n == m+1){
		res = -1;
		ok = 1;
		for(int i=0;i<m;i++) ok &= (min(a[i], b[i]) == 0);
		if(ok){
			for(int i=0;i<m;i++) d[max(a[i], b[i])] = c[i];
			for(int i=1;i<n;i++) mm.pb({d[i], i});
			sort(mm.begin(), mm.end());
			mm.resize(3);
		} else ok = -1;
	} 
}

/*

5 6
0 1 4
0 2 4
1 2 1
1 3 2
2 3 3
1 4 10
3
1 2
2 4
0 1

*/

const int mod = 1e9+7;
int mn[NN], par[NN], bad[NN];

int32_t getMinimumFuelCapacity(int32_t x, int32_t y) {
	if(ok == -1) return res;
	if(x > y) swap(x, y);
	if(n == 2) return -1;
	if(n <= 1000 && !ok){
		priority_queue<pair<int, int>> qq;
		qq.push({0, x});
		memset(mn, 127, sizeof mn);
		memset(bad, 0, sizeof bad);
		memset(par, 0, sizeof par);
		par[x] = -1;
		mn[x] = 0;
		while(!qq.empty()){
			auto u = qq.top(); qq.pop();
			if(mn[u.ss] < -u.ff) continue;
			for(auto x : edges[u.ss]) if(umin(mn[x.ff], max(mn[u.ss], x.ss))) par[x.ff] = u.ss, qq.push({-mn[x.ff], x.ff});
		}
		int trr = mn[y];
		int tt = y;
		while(~tt){
			bad[tt] = 1;
			tt = par[tt];
		}
		
		int rr = mod;
		vector<pair<int, int>> nall;
		for(int i=0;i<n;i++){
			if(bad[i]){
				if(i == y || i == x){
					int mn = mod, in = -1, mn2 = mod;
					for(auto x : edges[i]){
						if(bad[x.ff]) continue;
						if(umin(mn, x.ss)) in = x.ff;
					} for(auto x : edges[i]){
						if(bad[x.ff] || in == x.ff) continue;
						umin(mn2, x.ss);
					} umin(rr, mn2);
					//cout<<mn<<" "<<mn2<<"\n";
				} else {
					int mn = mod;
					for(auto x : edges[i]){
						if(bad[x.ff]) continue;
						umin(mn, x.ss);
					} umin(rr, mn);
				}
			}
		}
		for(auto xx : edges[x]) if(bad[xx.ff]) nall.pb({xx.ff, x});
		qq.push({0, x});
		memset(mn, 127, sizeof mn);
		mn[x] = 0;
		while(!qq.empty()){
			auto u = qq.top(); qq.pop();
			if(mn[u.ss] < -u.ff) continue;
			for(auto x : edges[u.ss]){
				int ok = 1;
				for(auto xx : nall) if(xx == make_pair(u.ss, x.ff) || xx == make_pair(x.ff, u.ss)) ok = 0;
				if(ok && umin(mn[x.ff], max(mn[u.ss], x.ss))) qq.push({-mn[x.ff], x.ff});
			}
		} 
		
		nall.clear();
		for(auto xx : edges[y]) if(bad[xx.ff]) nall.pb({xx.ff, y});
		qq.push({0, x});
		memset(mn, 127, sizeof mn);
		mn[x] = 0;
		while(!qq.empty()){
			auto u = qq.top(); qq.pop();
			if(mn[u.ss] < -u.ff) continue;
			for(auto x : edges[u.ss]){
				int ok = 1;
				for(auto xx : nall) if(xx == make_pair(u.ss, x.ff) || xx == make_pair(x.ff, u.ss)) ok = 0;
				if(ok && umin(mn[x.ff], max(mn[u.ss], x.ss))) qq.push({-mn[x.ff], x.ff});
			}
		} 
		
		umin(rr, mn[y]);
		if(rr == mod) return -1;
		return max(rr, trr);
	}
	
	if(x == 0){
		if(y == mm[0].ss || y == mm[1].ss || y == mm[2].ss) return max({mm[0].ff, mm[1].ff, mm[2].ff});
		else return max({d[y], mm[0].ff, mm[1].ff});
	} else {
		if(n == 3) return -1;
		if((mm[0].ss == y || mm[1].ss == y) && (mm[0].ss == x || mm[1].ss == x)) return max({d[x], d[y], mm[2].ff});
		else if(x == mm[0].ss || y == mm[0].ss) return max({d[x], d[y], mm[1].ff});
		else return max({d[x], d[y], mm[0].ff});
	} 
}

Subtask #1
6.0 / 6.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 3 ms 2636 KB Output is correct
8 Correct 3 ms 2636 KB Output is correct
9 Correct 47 ms 8568 KB Output is correct
10 Correct 59 ms 9916 KB Output is correct
11 Correct 61 ms 9784 KB Output is correct
12 Correct 60 ms 10088 KB Output is correct
13 Correct 59 ms 10100 KB Output is correct
14 Correct 53 ms 8700 KB Output is correct
15 Correct 122 ms 11756 KB Output is correct
16 Correct 120 ms 11632 KB Output is correct
17 Correct 121 ms 11948 KB Output is correct
18 Correct 134 ms 11964 KB Output is correct
19 Correct 64 ms 7236 KB Output is correct
20 Correct 125 ms 12888 KB Output is correct
21 Correct 129 ms 12880 KB Output is correct
22 Correct 132 ms 13284 KB Output is correct
23 Correct 127 ms 13352 KB Output is correct

Subtask #2
7.0 / 7.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 121 ms 14632 KB Output is correct
4 Correct 123 ms 14900 KB Output is correct
5 Correct 126 ms 14924 KB Output is correct
6 Correct 130 ms 14940 KB Output is correct
7 Correct 138 ms 14924 KB Output is correct
8 Correct 129 ms 14516 KB Output is correct
9 Correct 123 ms 14800 KB Output is correct
10 Correct 124 ms 14400 KB Output is correct

Subtask #3
0 / 17.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 3 ms 2636 KB Output is correct
8 Correct 3 ms 2636 KB Output is correct
9 Correct 4 ms 4940 KB Output is correct
10 Incorrect 2 ms 2636 KB Output isn't correct
11 Halted 0 ms 0 KB -

Subtask #4
0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 3 ms 2636 KB Output is correct
9 Correct 3 ms 2636 KB Output is correct
10 Correct 47 ms 8568 KB Output is correct
11 Correct 59 ms 9916 KB Output is correct
12 Correct 61 ms 9784 KB Output is correct
13 Correct 60 ms 10088 KB Output is correct
14 Correct 59 ms 10100 KB Output is correct
15 Incorrect 2 ms 2636 KB Output isn't correct
16 Halted 0 ms 0 KB -

Subtask #5
0 / 23.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 2636 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 3 ms 2636 KB Output is correct
8 Correct 3 ms 2636 KB Output is correct
9 Correct 47 ms 8568 KB Output is correct
10 Correct 59 ms 9916 KB Output is correct
11 Correct 61 ms 9784 KB Output is correct
12 Correct 60 ms 10088 KB Output is correct
13 Correct 59 ms 10100 KB Output is correct
14 Correct 53 ms 8700 KB Output is correct
15 Correct 122 ms 11756 KB Output is correct
16 Correct 120 ms 11632 KB Output is correct
17 Correct 121 ms 11948 KB Output is correct
18 Correct 134 ms 11964 KB Output is correct
19 Correct 121 ms 14632 KB Output is correct
20 Correct 123 ms 14900 KB Output is correct
21 Correct 126 ms 14924 KB Output is correct
22 Correct 130 ms 14940 KB Output is correct
23 Correct 138 ms 14924 KB Output is correct
24 Correct 129 ms 14516 KB Output is correct
25 Correct 123 ms 14800 KB Output is correct
26 Correct 124 ms 14400 KB Output is correct
27 Incorrect 2 ms 2636 KB Output isn't correct
28 Halted 0 ms 0 KB -

Subtask #6
0 / 27.0

# Verdict Execution time Memory Grader output
1 Correct 4 ms 4940 KB Output is correct
2 Correct 2 ms 2636 KB Output is correct
3 Correct 2 ms 2636 KB Output is correct
4 Correct 2 ms 2636 KB Output is correct
5 Correct 2 ms 2636 KB Output is correct
6 Correct 2 ms 2636 KB Output is correct
7 Correct 2 ms 2636 KB Output is correct
8 Correct 3 ms 2636 KB Output is correct
9 Correct 3 ms 2636 KB Output is correct
10 Correct 47 ms 8568 KB Output is correct
11 Correct 59 ms 9916 KB Output is correct
12 Correct 61 ms 9784 KB Output is correct
13 Correct 60 ms 10088 KB Output is correct
14 Correct 59 ms 10100 KB Output is correct
15 Correct 53 ms 8700 KB Output is correct
16 Correct 122 ms 11756 KB Output is correct
17 Correct 120 ms 11632 KB Output is correct
18 Correct 121 ms 11948 KB Output is correct
19 Correct 134 ms 11964 KB Output is correct
20 Correct 121 ms 14632 KB Output is correct
21 Correct 123 ms 14900 KB Output is correct
22 Correct 126 ms 14924 KB Output is correct
23 Correct 130 ms 14940 KB Output is correct
24 Correct 138 ms 14924 KB Output is correct
25 Correct 129 ms 14516 KB Output is correct
26 Correct 123 ms 14800 KB Output is correct
27 Correct 124 ms 14400 KB Output is correct
28 Incorrect 2 ms 2636 KB Output isn't correct
29 Halted 0 ms 0 KB -