// vaziat meshki-ghermeze !
#include <bits/stdc++.h>
#define pb push_back
#define F first
#define S second
#define all(x) x.begin(), x.end()
#define debug(x) cerr << #x << " : " << x << '\n'
using namespace std;
typedef long long ll;
typedef long double ld;
typedef string str;
typedef pair<int, int> pii;
const ll Mod = 1000000007LL;
const int N = 4e5 + 10;
const ll Inf = 2242545357980376863LL;
const ll Log = 30;
int to[N], c[N], p[N], m = 2;
vector<int> G[N];
ll dis[2][N]; // 0 -> Null, 1 -> fixed
ll sm[N], cost[N];
int nl[N];
int la[N], cn[N];
map<int, int> mp[N];
int main(){
ios::sync_with_stdio(0); cin.tie(0); cout.tie(0);
int n, _m;
cin >> n >> _m;
int u, v;
for(int i = 0; i < _m; i++){
cin >> u >> v >> c[m] >> p[m];
c[m + 1] = c[m]; p[m + 1] = p[m];
to[m] = v; to[m + 1] = u;
G[u].pb(m);
G[v].pb(m + 1);
m += 2;
}
to[0] = 1;
to[1] = -1;
c[0] = c[1] = _m + 2;
for(int i = 1; i <= n; i++){
for(auto e : G[i]){
sm[c[e]] += p[e];
}
for(auto e : G[i]){
cost[e] = sm[c[e]] - p[e];
}
for(auto e : G[i]){
sm[c[e]] -= p[e];
}
}
memset(dis, 31, sizeof dis);
dis[0][0] = 0;
set< pair<ll, pii> > st;
st.insert({0, {0, 0}});
ll ans = Inf;
memset(la, -1, sizeof la);
while(!st.empty()){
pii fr = st.begin() -> S;
st.erase(st.begin());
ll d = dis[fr.F][fr.S];
int ed = fr.S;
u = to[fr.S];
if(fr.F == 0){
mp[u][c[ed]] ++;
if(mp[u][c[ed]] == 2) continue;
// mp[u][c[ed]] ++;
// } else {
// }
} else {
cn[u] ++;
if(cn[u] > 2) continue;
// if(la[u] == c[ed]) continue;
// la[u] = c[ed];
// cn[u] ++;
// if(cn[u] > 2) continue;
}
// cerr << "## " << d << ' ' << ed << ' ' << u << '\n';
for(auto nx : G[u]){
if((nx ^ 1) == ed) continue;
// cerr << "! " << ' ' << nx << '\n';
for(int ch = 0; ch < 2; ch ++){
ll cst = cost[nx];
if(ch == 0) cst = p[nx];
if(ch == 1 && c[ed] == c[nx] && fr.F == 0)
cst -= p[ed];
// cerr << "^ " << dis[c]
if(dis[ch][nx] > d + cst){
st.erase({dis[ch][nx], {ch, nx}});
dis[ch][nx] = d + cst;
st.insert({dis[ch][nx], {ch, nx}});
}
}
}
if(u == n) ans = min(ans, d);
}
cout << (ans == Inf ? -1 : ans) << '\n';
return 0;
}
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
25 ms |
36292 KB |
Output is correct |
2 |
Correct |
27 ms |
36280 KB |
Output is correct |
3 |
Correct |
26 ms |
36300 KB |
Output is correct |
4 |
Correct |
27 ms |
36352 KB |
Output is correct |
5 |
Correct |
27 ms |
36388 KB |
Output is correct |
6 |
Correct |
28 ms |
36296 KB |
Output is correct |
7 |
Correct |
25 ms |
36556 KB |
Output is correct |
8 |
Correct |
28 ms |
36460 KB |
Output is correct |
9 |
Correct |
33 ms |
36808 KB |
Output is correct |
10 |
Correct |
37 ms |
36780 KB |
Output is correct |
11 |
Correct |
44 ms |
36812 KB |
Output is correct |
12 |
Correct |
39 ms |
36552 KB |
Output is correct |
13 |
Correct |
44 ms |
36832 KB |
Output is correct |
14 |
Correct |
44 ms |
36812 KB |
Output is correct |
15 |
Correct |
29 ms |
36420 KB |
Output is correct |
16 |
Incorrect |
31 ms |
36532 KB |
Output isn't correct |
17 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
579 ms |
55916 KB |
Output is correct |
2 |
Correct |
238 ms |
44484 KB |
Output is correct |
3 |
Correct |
1760 ms |
73496 KB |
Output is correct |
4 |
Correct |
379 ms |
48328 KB |
Output is correct |
5 |
Execution timed out |
3065 ms |
72020 KB |
Time limit exceeded |
6 |
Halted |
0 ms |
0 KB |
- |
# |
결과 |
실행 시간 |
메모리 |
Grader output |
1 |
Correct |
25 ms |
36292 KB |
Output is correct |
2 |
Correct |
27 ms |
36280 KB |
Output is correct |
3 |
Correct |
26 ms |
36300 KB |
Output is correct |
4 |
Correct |
27 ms |
36352 KB |
Output is correct |
5 |
Correct |
27 ms |
36388 KB |
Output is correct |
6 |
Correct |
28 ms |
36296 KB |
Output is correct |
7 |
Correct |
25 ms |
36556 KB |
Output is correct |
8 |
Correct |
28 ms |
36460 KB |
Output is correct |
9 |
Correct |
33 ms |
36808 KB |
Output is correct |
10 |
Correct |
37 ms |
36780 KB |
Output is correct |
11 |
Correct |
44 ms |
36812 KB |
Output is correct |
12 |
Correct |
39 ms |
36552 KB |
Output is correct |
13 |
Correct |
44 ms |
36832 KB |
Output is correct |
14 |
Correct |
44 ms |
36812 KB |
Output is correct |
15 |
Correct |
29 ms |
36420 KB |
Output is correct |
16 |
Incorrect |
31 ms |
36532 KB |
Output isn't correct |
17 |
Halted |
0 ms |
0 KB |
- |