oj.uz

Submission #446443

# Submission time Handle Problem Language Result Execution time Memory
446443 2021-07-21T23:31:24 Z jamezzz Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 417 ms 4156 KB 
#include <bits/stdc++.h>
using namespace std;

#define int long long

#ifdef DEBUG
#define dbg(...) printf(__VA_ARGS__);
#else
#define dbg(...)
#endif
#define sf scanf
#define pf printf
#define fi first
#define se second
#define pb emplace_back
#define sz(x) (int)x.size()
#define mnto(x,y) x=min(x,(__typeof__(x))y)
#define mxto(x,y) x=max(x,(__typeof__(x))y)
#define INF 1023456789123456789ll
#define all(x) x.begin(), x.end()
typedef long long ll;
typedef long double ld;
typedef pair<int, int> ii;
typedef pair<ll, ll> pll;
typedef tuple<int, int, int> iii;
typedef tuple<int, int, int, int> iiii;
typedef vector<int> vi;
typedef vector<ii> vii;
typedef vector<pll> vll;
mt19937 rng(time(0));

#define maxn 205
#define maxm 50005

int n,m,u[maxm],v[maxm],c[maxm],d[maxm],dd[maxn];
int dist[maxn][maxn];
vi AL[maxn];
priority_queue<ii,vector<ii>,greater<ii>> pq;

int dij(int s,int t){
	for(int i=0;i<n;++i)dd[i]=INF;
	dd[s]=0;pq.push(ii(0,s));
	while(!pq.empty()){
		ii pr=pq.top();pq.pop();
		if(dd[pr.se]<pr.fi)continue;
		for(int i:AL[pr.se]){
			if(dd[v[i]]>dd[u[i]]+c[i]){
				dd[v[i]]=dd[u[i]]+c[i];
				pq.push(ii(dd[v[i]],v[i]));
			}
		}
	}
	return dd[t];
}

int32_t main(){
	sf("%lld%lld",&n,&m);
	for(int i=0;i<n;++i){
		for(int j=0;j<n;++j){
			if(i!=j)dist[i][j]=INF;
		}
	}
	for(int i=0;i<m;++i){
		sf("%lld%lld%lld%lld",&u[i],&v[i],&c[i],&d[i]);
		--u[i];--v[i];
		mnto(dist[u[i]][v[i]],c[i]);
		AL[u[i]].pb(i);
	}
	for(int k=0;k<n;++k){
		for(int i=0;i<n;++i){
			for(int j=0;j<n;++j){
				mnto(dist[i][j],dist[i][k]+dist[k][j]);
			}
		}
	}
	int ans=min(INF,dist[0][n-1]+dist[n-1][0]);
	for(int i=0;i<m;++i){
		int d1=min(dist[0][n-1],dist[0][v[i]]+c[i]+dist[u[i]][n-1]);
		int d2=min(dist[n-1][0],dist[n-1][v[i]]+c[i]+dist[u[i]][0]);
		if(d1+d2+d[i]<ans){
			AL[u[i]].erase(find(all(AL[u[i]]),i));
			AL[v[i]].pb(i);
			swap(u[i],v[i]);
			mnto(ans,dij(0,n-1)+dij(n-1,0)+d[i]);
			swap(u[i],v[i]);
			AL[u[i]].pb(i);
			AL[v[i]].pop_back();
		}
	}
	if(ans==INF)ans=-1;
	pf("%lld\n",ans);
}

Compilation message

ho_t4.cpp: In function 'int32_t main()':
ho_t4.cpp:57:4: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   57 |  sf("%lld%lld",&n,&m);
      |    ^
ho_t4.cpp:64:5: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   64 |   sf("%lld%lld%lld%lld",&u[i],&v[i],&c[i],&d[i]);
      |     ^

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 708 KB Output is correct
2 Correct 10 ms 660 KB Output is correct
3 Correct 10 ms 720 KB Output is correct
4 Correct 10 ms 716 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 10 ms 660 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 14 ms 728 KB Output is correct
11 Correct 23 ms 712 KB Output is correct
12 Correct 28 ms 704 KB Output is correct
13 Correct 11 ms 716 KB Output is correct
14 Correct 11 ms 716 KB Output is correct
15 Correct 10 ms 712 KB Output is correct
16 Correct 10 ms 716 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 41 ms 3848 KB Output is correct
2 Correct 32 ms 3864 KB Output is correct
3 Correct 32 ms 3908 KB Output is correct
4 Correct 11 ms 716 KB Output is correct
5 Correct 11 ms 716 KB Output is correct
6 Correct 10 ms 572 KB Output is correct
7 Correct 12 ms 664 KB Output is correct
8 Correct 1 ms 332 KB Output is correct
9 Correct 40 ms 4000 KB Output is correct
10 Correct 35 ms 4000 KB Output is correct
11 Correct 45 ms 4036 KB Output is correct
12 Correct 33 ms 4004 KB Output is correct
13 Correct 33 ms 4056 KB Output is correct
14 Correct 32 ms 4156 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 10 ms 716 KB Output is correct
2 Correct 10 ms 656 KB Output is correct
3 Correct 26 ms 3036 KB Output is correct
4 Correct 10 ms 660 KB Output is correct
5 Correct 31 ms 3680 KB Output is correct
6 Correct 0 ms 332 KB Output is correct
7 Correct 0 ms 316 KB Output is correct
8 Correct 36 ms 3760 KB Output is correct
9 Correct 37 ms 3768 KB Output is correct
10 Correct 44 ms 3708 KB Output is correct
11 Correct 42 ms 3768 KB Output is correct
12 Correct 32 ms 3748 KB Output is correct
13 Correct 1 ms 332 KB Output is correct
14 Correct 0 ms 332 KB Output is correct
15 Correct 0 ms 332 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 0 ms 332 KB Output is correct
18 Correct 1 ms 332 KB Output is correct
19 Correct 31 ms 3788 KB Output is correct
20 Correct 42 ms 3780 KB Output is correct
21 Correct 40 ms 3788 KB Output is correct
22 Correct 42 ms 3760 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 11 ms 708 KB Output is correct
2 Correct 10 ms 660 KB Output is correct
3 Correct 10 ms 720 KB Output is correct
4 Correct 10 ms 716 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 10 ms 660 KB Output is correct
7 Correct 1 ms 332 KB Output is correct
8 Correct 0 ms 332 KB Output is correct
9 Correct 1 ms 332 KB Output is correct
10 Correct 14 ms 728 KB Output is correct
11 Correct 23 ms 712 KB Output is correct
12 Correct 28 ms 704 KB Output is correct
13 Correct 11 ms 716 KB Output is correct
14 Correct 11 ms 716 KB Output is correct
15 Correct 10 ms 712 KB Output is correct
16 Correct 10 ms 716 KB Output is correct
17 Correct 41 ms 3848 KB Output is correct
18 Correct 32 ms 3864 KB Output is correct
19 Correct 32 ms 3908 KB Output is correct
20 Correct 11 ms 716 KB Output is correct
21 Correct 11 ms 716 KB Output is correct
22 Correct 10 ms 572 KB Output is correct
23 Correct 12 ms 664 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 40 ms 4000 KB Output is correct
26 Correct 35 ms 4000 KB Output is correct
27 Correct 45 ms 4036 KB Output is correct
28 Correct 33 ms 4004 KB Output is correct
29 Correct 33 ms 4056 KB Output is correct
30 Correct 32 ms 4156 KB Output is correct
31 Correct 10 ms 716 KB Output is correct
32 Correct 10 ms 656 KB Output is correct
33 Correct 26 ms 3036 KB Output is correct
34 Correct 10 ms 660 KB Output is correct
35 Correct 31 ms 3680 KB Output is correct
36 Correct 0 ms 332 KB Output is correct
37 Correct 0 ms 316 KB Output is correct
38 Correct 36 ms 3760 KB Output is correct
39 Correct 37 ms 3768 KB Output is correct
40 Correct 44 ms 3708 KB Output is correct
41 Correct 42 ms 3768 KB Output is correct
42 Correct 32 ms 3748 KB Output is correct
43 Correct 1 ms 332 KB Output is correct
44 Correct 0 ms 332 KB Output is correct
45 Correct 0 ms 332 KB Output is correct
46 Correct 1 ms 332 KB Output is correct
47 Correct 0 ms 332 KB Output is correct
48 Correct 1 ms 332 KB Output is correct
49 Correct 31 ms 3788 KB Output is correct
50 Correct 42 ms 3780 KB Output is correct
51 Correct 40 ms 3788 KB Output is correct
52 Correct 42 ms 3760 KB Output is correct
53 Correct 31 ms 3812 KB Output is correct
54 Correct 32 ms 3804 KB Output is correct
55 Correct 31 ms 3792 KB Output is correct
56 Correct 11 ms 716 KB Output is correct
57 Correct 10 ms 712 KB Output is correct
58 Correct 38 ms 3172 KB Output is correct
59 Correct 30 ms 3212 KB Output is correct
60 Correct 30 ms 3204 KB Output is correct
61 Correct 29 ms 3208 KB Output is correct
62 Correct 66 ms 3192 KB Output is correct
63 Correct 121 ms 3184 KB Output is correct
64 Correct 84 ms 3556 KB Output is correct
65 Correct 205 ms 3632 KB Output is correct
66 Correct 417 ms 3548 KB Output is correct
67 Correct 18 ms 2760 KB Output is correct
68 Correct 40 ms 3968 KB Output is correct
69 Correct 35 ms 4128 KB Output is correct
70 Correct 33 ms 4036 KB Output is correct
71 Correct 33 ms 3908 KB Output is correct
72 Correct 32 ms 4052 KB Output is correct
73 Correct 32 ms 4048 KB Output is correct
74 Correct 33 ms 3952 KB Output is correct