oj.uz

Submission #666536

# Submission time Handle Problem Language Result Execution time Memory
666536 2022-11-28T21:36:05 Z kinope Olympic Bus (JOI20_ho_t4) C++14
100 / 100
 338 ms 13332 KB 
#include <bits/stdc++.h>
#define ff first
#define ss second
#define int unsigned
using namespace std;
typedef long long ll;
typedef pair<ll, int> pli;
typedef pair<int, int> pii;
struct st{int a, b, c; ll d;} kraw[50000];

vector<int> g[201][2];
int C[201][201][2], n;
int odl[4][201][201]; //0. to z 1 do innych, 1. to z n do innych, 2. to z innych do 1, 3. to z innych do n
bool odw[201];

void dijkstra(int s, int y, int b, bool ODWR){
		for(int i = 1; i <= n; ++i) odw[i] = 0;
		odw[y] = 1;
		odl[b][s][y] = 0;
		for(int x = 1; x <= n; ++x){
				int u=0; ll dis = 2e09;
				for(int j = 1; j <= n; ++j){
						if(odw[j]) continue;
						if(dis > odl[b][j][y]) u = j, dis = odl[b][j][y];
				}
				if(!u) return;
				odw[u] = 1;
				for(int j = 1; j <= n; ++j){
						if(odw[j]) continue;
						odl[b][j][y] = min(odl[b][j][y], odl[b][u][y] + C[u][j][ODWR]);
				}
		}
}

void read(int &a){
		a = 0; char c = getchar_unlocked();
		while(c<'0'||'9'<c) c = getchar_unlocked();
		while('0'<=c&&c<='9') a = (a<<3)+(a<<1)+c-48, c = getchar_unlocked();
}
void readll(ll &a){
		a = 0; char c = getchar_unlocked();
		while(c<'0'||'9'<c) c = getchar_unlocked();
		while('0'<=c&&c<='9') a = (a<<3)+(a<<1)+c-48, c = getchar_unlocked();
}

signed main(){
		int m, a, b, c; ll d;
		read(n); read(m);
		for(int i = 0; i <= n; ++i)
				for(int j = 0; j <= n; ++j) odl[0][i][j] = odl[1][i][j] = odl[2][i][j] = odl[3][i][j] = C[i][j][0] = C[i][j][1] = 2e09;
		
		for(int i = 0; i < m; ++i){
				read(a); read(b); read(c); readll(d);
				kraw[i] = {a, b, c, d};
				if(C[a][b][0] == 2e09) g[a][0].emplace_back(b);
				if(C[b][a][1] == 2e09) g[b][1].emplace_back(a);
				C[a][b][0] = min(C[a][b][0], c);
				C[b][a][1] = min(C[b][a][1], c);
		}
		
		for(int j = 0; j <= n; ++j) odl[0][1][j] = odl[1][n][j] = odl[2][1][j] = odl[3][n][j] = 0;
		
		for(int i = 2; i <= n; ++i){
				if(g[i][1].empty()) continue;
				dijkstra(1, i, 0, 0);
		} dijkstra(1, 0, 0, 0);
		for(int i = 1; i < n; ++i) {
				if(g[i][1].empty()) continue;
				dijkstra(n, i, 1, 0);
		} dijkstra(n, 0, 1, 0); 
		for(int i = 2; i <= n; ++i) dijkstra(1, i, 2, 1);
		for(int i = 1; i < n; ++i) dijkstra(n, i, 3, 1); 
		multiset<int> s[201][4]; //0. to z 1 do x, 1. to z n do x, 2. to z x do 1, 3. to z x do n
		
		for(int i = 0; i < m; ++i){
				a = kraw[i].a, b = kraw[i].b, c = kraw[i].c;
				s[b][0].emplace(odl[0][a][b] + c);
				s[b][1].emplace(odl[1][a][b] + c);
				s[a][2].emplace(odl[2][b][a] + c);
				s[a][3].emplace(odl[3][b][a] + c);
		}
		
		ll wynik = 2e09;
		
		for(int i = 0; i < m; ++i){
				a = kraw[i].a, b = kraw[i].b, c = kraw[i].c, d = kraw[i].d;
				
				int tmp = c + odl[0][a][b];
				multiset<int>::iterator it = s[b][0].find(tmp); s[b][0].erase(it);
				tmp = c + odl[1][a][b];
				it = s[b][1].find(tmp); s[b][1].erase(it);
				
				tmp = c + odl[2][a][b]; s[b][2].emplace(tmp);
				tmp = c + odl[3][a][b]; s[b][3].emplace(tmp);
				
				ll t0 = 2e09, t1 = 2e09, t2 = *s[b][2].begin(), t3 = *s[b][3].begin();
				if(s[b][0].size()) t0 = *s[b][0].begin();
				if(s[b][1].size()) t1 = *s[b][1].begin();
				
				if(b == 1) t0 = t2 = 0;
				if(b == n) t1 = t3 = 0;
				
				wynik = min(wynik, (ll) t0 + t3 + t1 + t2 + d);
				wynik = min(wynik, (ll) t0 + t3 + odl[1][1][b] + d);
				wynik = min(wynik, (ll) odl[0][n][b] + t1 + t2 + d);
				
				tmp = c + odl[2][a][b];
				it = s[b][2].find(tmp); s[b][2].erase(it);
				tmp = c + odl[3][a][b];
				it = s[b][3].find(tmp); s[b][3].erase(it);
				
				tmp = c + odl[0][a][b]; s[b][0].emplace(tmp);
				tmp = c + odl[1][a][b]; s[b][1].emplace(tmp);
		}
		wynik = min(wynik, (ll) odl[0][n][0] + odl[1][1][0]);
		
		if(wynik != 2e09) printf("%lld\n", wynik);
		else printf("-1");
		
		return 0;
}

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 1468 KB Output is correct
2 Correct 13 ms 1308 KB Output is correct
3 Correct 148 ms 1496 KB Output is correct
4 Correct 145 ms 1468 KB Output is correct
5 Correct 2 ms 724 KB Output is correct
6 Correct 33 ms 1236 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 148 ms 1476 KB Output is correct
11 Correct 149 ms 1472 KB Output is correct
12 Correct 153 ms 1464 KB Output is correct
13 Correct 71 ms 1468 KB Output is correct
14 Correct 107 ms 1476 KB Output is correct
15 Correct 109 ms 1480 KB Output is correct
16 Correct 109 ms 1484 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 264 ms 13028 KB Output is correct
2 Correct 245 ms 13004 KB Output is correct
3 Correct 246 ms 13212 KB Output is correct
4 Correct 155 ms 1768 KB Output is correct
5 Correct 146 ms 1456 KB Output is correct
6 Correct 50 ms 1436 KB Output is correct
7 Correct 4 ms 1364 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 165 ms 13272 KB Output is correct
10 Correct 150 ms 13128 KB Output is correct
11 Correct 201 ms 13112 KB Output is correct
12 Correct 216 ms 13180 KB Output is correct
13 Correct 203 ms 13312 KB Output is correct
14 Correct 212 ms 13156 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 96 ms 1472 KB Output is correct
2 Correct 51 ms 1292 KB Output is correct
3 Correct 155 ms 10412 KB Output is correct
4 Correct 33 ms 1304 KB Output is correct
5 Correct 182 ms 13136 KB Output is correct
6 Correct 1 ms 340 KB Output is correct
7 Correct 1 ms 340 KB Output is correct
8 Correct 226 ms 13068 KB Output is correct
9 Correct 211 ms 13092 KB Output is correct
10 Correct 193 ms 12968 KB Output is correct
11 Correct 173 ms 12940 KB Output is correct
12 Correct 179 ms 13068 KB Output is correct
13 Correct 1 ms 340 KB Output is correct
14 Correct 1 ms 340 KB Output is correct
15 Correct 1 ms 340 KB Output is correct
16 Correct 1 ms 340 KB Output is correct
17 Correct 1 ms 340 KB Output is correct
18 Correct 1 ms 340 KB Output is correct
19 Correct 189 ms 12940 KB Output is correct
20 Correct 207 ms 12964 KB Output is correct
21 Correct 175 ms 12940 KB Output is correct
22 Correct 189 ms 12948 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 90 ms 1468 KB Output is correct
2 Correct 13 ms 1308 KB Output is correct
3 Correct 148 ms 1496 KB Output is correct
4 Correct 145 ms 1468 KB Output is correct
5 Correct 2 ms 724 KB Output is correct
6 Correct 33 ms 1236 KB Output is correct
7 Correct 0 ms 340 KB Output is correct
8 Correct 1 ms 340 KB Output is correct
9 Correct 1 ms 596 KB Output is correct
10 Correct 148 ms 1476 KB Output is correct
11 Correct 149 ms 1472 KB Output is correct
12 Correct 153 ms 1464 KB Output is correct
13 Correct 71 ms 1468 KB Output is correct
14 Correct 107 ms 1476 KB Output is correct
15 Correct 109 ms 1480 KB Output is correct
16 Correct 109 ms 1484 KB Output is correct
17 Correct 264 ms 13028 KB Output is correct
18 Correct 245 ms 13004 KB Output is correct
19 Correct 246 ms 13212 KB Output is correct
20 Correct 155 ms 1768 KB Output is correct
21 Correct 146 ms 1456 KB Output is correct
22 Correct 50 ms 1436 KB Output is correct
23 Correct 4 ms 1364 KB Output is correct
24 Correct 1 ms 340 KB Output is correct
25 Correct 165 ms 13272 KB Output is correct
26 Correct 150 ms 13128 KB Output is correct
27 Correct 201 ms 13112 KB Output is correct
28 Correct 216 ms 13180 KB Output is correct
29 Correct 203 ms 13312 KB Output is correct
30 Correct 212 ms 13156 KB Output is correct
31 Correct 96 ms 1472 KB Output is correct
32 Correct 51 ms 1292 KB Output is correct
33 Correct 155 ms 10412 KB Output is correct
34 Correct 33 ms 1304 KB Output is correct
35 Correct 182 ms 13136 KB Output is correct
36 Correct 1 ms 340 KB Output is correct
37 Correct 1 ms 340 KB Output is correct
38 Correct 226 ms 13068 KB Output is correct
39 Correct 211 ms 13092 KB Output is correct
40 Correct 193 ms 12968 KB Output is correct
41 Correct 173 ms 12940 KB Output is correct
42 Correct 179 ms 13068 KB Output is correct
43 Correct 1 ms 340 KB Output is correct
44 Correct 1 ms 340 KB Output is correct
45 Correct 1 ms 340 KB Output is correct
46 Correct 1 ms 340 KB Output is correct
47 Correct 1 ms 340 KB Output is correct
48 Correct 1 ms 340 KB Output is correct
49 Correct 189 ms 12940 KB Output is correct
50 Correct 207 ms 12964 KB Output is correct
51 Correct 175 ms 12940 KB Output is correct
52 Correct 189 ms 12948 KB Output is correct
53 Correct 320 ms 13276 KB Output is correct
54 Correct 338 ms 13224 KB Output is correct
55 Correct 318 ms 13212 KB Output is correct
56 Correct 151 ms 1472 KB Output is correct
57 Correct 156 ms 1516 KB Output is correct
58 Correct 250 ms 10944 KB Output is correct
59 Correct 256 ms 10808 KB Output is correct
60 Correct 289 ms 10796 KB Output is correct
61 Correct 263 ms 10828 KB Output is correct
62 Correct 272 ms 10832 KB Output is correct
63 Correct 252 ms 10760 KB Output is correct
64 Correct 252 ms 10784 KB Output is correct
65 Correct 249 ms 10760 KB Output is correct
66 Correct 203 ms 10904 KB Output is correct
67 Correct 71 ms 9664 KB Output is correct
68 Correct 188 ms 13308 KB Output is correct
69 Correct 190 ms 13228 KB Output is correct
70 Correct 246 ms 13312 KB Output is correct
71 Correct 252 ms 13204 KB Output is correct
72 Correct 244 ms 13332 KB Output is correct
73 Correct 246 ms 13216 KB Output is correct
74 Correct 255 ms 13212 KB Output is correct