oj.uz

Submission #877495

# Submission time Handle Problem Language Result Execution time Memory
877495 2023-11-23T09:24:48 Z efedmrlr Olympic Bus (JOI20_ho_t4) C++17
100 / 100
 652 ms 7808 KB 
#include <bits/stdc++.h>
using namespace std;

#define n_l '\n'
#define dbg(...) cout << "[" << #__VA_ARGS__ << "]: "; cout << to_string(__VA_ARGS__) << endl
template <typename T, size_t N> int SIZE(const T (&t)[N]){ return N; } template<typename T> int SIZE(const T &t){ return t.size(); } string to_string(const string s, int x1=0, int x2=1e9){ return '"' + ((x1 < s.size()) ? s.substr(x1, x2-x1+1) : "") + '"'; } string to_string(const char* s) { return to_string((string) s); } string to_string(const bool b) { return (b ? "true" : "false"); } string to_string(const char c){ return string({c}); } template<size_t N> string to_string(const bitset<N> &b, int x1=0, int x2=1e9){ string t = ""; for(int __iii__ = min(x1,SIZE(b)),  __jjj__ = min(x2, SIZE(b)-1); __iii__ <= __jjj__; ++__iii__){ t += b[__iii__] + '0'; } return '"' + t + '"'; } template <typename A, typename... C> string to_string(const A (&v), int x1=0, int x2=1e9, C... coords); int l_v_l_v_l = 0, t_a_b_s = 0; template <typename A, typename B> string to_string(const pair<A, B> &p) { l_v_l_v_l++; string res = "(" + to_string(p.first) + ", " + to_string(p.second) + ")"; l_v_l_v_l--; return res; } template <typename A, typename... C> string to_string(const A (&v), int x1, int x2, C... coords) { int rnk = rank<A>::value; string tab(t_a_b_s, ' '); string res = ""; bool first = true; if(l_v_l_v_l == 0) res += n_l; res += tab + "["; x1 = min(x1, SIZE(v)), x2 = min(x2, SIZE(v)); auto l = begin(v); advance(l, x1); auto r = l; advance(r, (x2-x1) + (x2 < SIZE(v))); for (auto e = l; e != r; e = next(e)) { if (!first) { res += ", "; } first = false; l_v_l_v_l++; if(e != l){ if(rnk > 1) { res += n_l; t_a_b_s = l_v_l_v_l; }; } else{ t_a_b_s = 0; } res += to_string(*e, coords...); l_v_l_v_l--; } res += "]"; if(l_v_l_v_l == 0) res += n_l; return res; } void dbgm(){;} template<typename Heads, typename... Tails> void dbgm(Heads H, Tails... T){ cout << to_string(H) << " | "; dbgm(T...); } 
#define dbgm(...) cout << "[" << #__VA_ARGS__ << "]: "; dbgm(__VA_ARGS__); cout << endl


#define int long long int
#define MP make_pair
#define pb push_back
#define REP(i,n) for(int (i) = 0; (i) < (n); (i)++)

void fastio() {
    ios_base::sync_with_stdio(false);
    cin.tie(NULL);
}


const double EPS = 0.00001;
const int INF = 1e16;
const int N = 205;
const int M = 1005;
const int ALPH = 26;
const int LGN = 25;
const int MOD = 1e9+7;
int n,m,q;
vector<array<int,4> > edges;
vector<int> SP[2][N], SPR[2][N];
int ans = INF;

void dijkstra(vector<vector<array<int,2> > > &adj, vector<int> &sp, int src) {
    sp.assign(n+3, INF);
    vector<bool> vis(n+3, 0);
    sp[src] = 0;
    while(src) {
        int cur = src;
        src = 0;
        vis[cur] = 1;
    
        for(auto c : adj[cur]) {
            sp[c[0]] = min(sp[c[0]] , sp[cur] + c[1]);
        }
        for(int i = 1; i<=n; i++) {
            if(vis[i]) continue;
            if(sp[src] > sp[i]) {
                src = i;
            }
        }
    }

}
bool dfs(int node, int fin, vector<int> &spath, vector<int> &sp, vector<vector<array<int,3> > > &adj, vector<int> &vis) {
    vis[node] = 1;
    if(node == fin) {
        
        return 1;
    }
    for(auto c : adj[node]) {
        if(vis[c[0]] || sp[node] + c[1] != sp[c[0]]) continue;
        if(dfs(c[0], fin, spath, sp, adj, vis)) {
            spath[c[2]] = 1;
            return 1;
        }
    }
    return 0;
}
void start_dfs(vector<int> &spat0, vector<int> &spat1, vector<int> &sp0, vector<int> &sp1) {
    vector<int> vis(n+3, 0);
    vector<vector<array<int,3> > > adj(n+3, vector<array<int,3> > ());
    spat0.assign(m+3, 0); spat1.assign(m + 3, 0);
    for(int i = 0; i<m; i++) {
        auto eg = edges[i];
        adj[eg[0]].pb({eg[1], eg[2], i});
    }
    dfs(1, n, spat0, sp0, adj, vis);
    vis.assign(n+3, 0);
    dfs(n, 1, spat1, sp1, adj, vis);
}
void new_dijk(vector<int> &sp, int ind, int src) {
    vector<vector<array<int,2> > > adj(n+3, vector<array<int,2> >());
    // adj[edges[ind][1]].pb({edges[ind][0], edges[ind][2]});
    for(int i = 0; i<m; i++) {
        if(i == ind) continue;
        auto &eg = edges[i];
        adj[eg[0]].pb({eg[1], eg[2]}); 
    }
    dijkstra(adj, sp, src);
}
inline void solve() {
    cin>>n>>m;
    edges.resize(m);
    REP(i,m) {
        cin>>edges[i][0]>>edges[i][1]>>edges[i][2]>>edges[i][3];

    }
    for(int i = 0; i<=n; i++) {
        vector<vector<array<int,2> > > adj(n+3, vector<array<int,2> >());
        for(auto eg : edges) {
            if(eg[0] == i || eg[1] == i) continue;
            adj[eg[0]].pb({eg[1], eg[2]});
        }
        dijkstra(adj, SP[0][i], 1);
        dijkstra(adj, SP[1][i], n);
        adj.assign(n+3, vector<array<int,2> > ());
        for(auto eg : edges) {
            if(eg[0] == i || eg[1] == i) continue;
            adj[eg[1]].pb({eg[0], eg[2]});
        }
        dijkstra(adj, SPR[0][i], 1);
        dijkstra(adj, SPR[1][i], n);

    }
    vector<int> spath[2];
    start_dfs(spath[0], spath[1], SP[0][0], SP[1][0]);
    // dbg(SP[0][0]);
    ans = min(ans , SP[0][0][n] + SP[1][0][1]); //initial state
    // dbg(ans);
    // dbg(spath[0]); dbg(spath[1]);

    for(int i = 0; i<m; i++) {
        auto eg = edges[i];
        int cost;
        // dbg(eg);
        // cout<<"find AB\n";
        if(spath[0][i]) {
            vector<int> sp;
            new_dijk(sp, i, 1);
            cost = sp[n];
        }
        else {
            cost = SP[0][0][n];
        }
        
        // dbg(cost);
        int pathAB = min( (SP[0][eg[0]][eg[1]] + SPR[1][eg[1]][eg[0]] + eg[2]) , cost); 
        // cout<<"find BA\n";
        if(spath[1][i]) {
            vector<int> sp;
            new_dijk(sp, i, n);
            cost = sp[1];
            // cout<<"CRIT\n";
        }
        else {
            cost = SP[1][0][1];
        }
        // dbg(cost);
        int pathBA = min(SP[1][eg[0]][eg[1]] + SPR[0][eg[1]][eg[0]] + eg[2], cost);
        
        int ret = pathAB + pathBA;
        
        // dbg(pathAB); dbg(pathBA);
        ret += eg[3];
        // dbg(ret);
        ans = min(ans , ret);
    }

    if(ans == INF) ans = -1;
    cout<<ans<<"\n";
}
 
signed main() {
    fastio();
    solve();   
}

Compilation message

ho_t4.cpp: In function 'std::string to_string(std::string, int, int)':
ho_t4.cpp:6:208: warning: comparison of integer expressions of different signedness: 'int' and 'std::__cxx11::basic_string<char>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    6 | template <typename T, size_t N> int SIZE(const T (&t)[N]){ return N; } template<typename T> int SIZE(const T &t){ return t.size(); } string to_string(const string s, int x1=0, int x2=1e9){ return '"' + ((x1 < s.size()) ? s.substr(x1, x2-x1+1) : "") + '"'; } string to_string(const char* s) { return to_string((string) s); } string to_string(const bool b) { return (b ? "true" : "false"); } string to_string(const char c){ return string({c}); } template<size_t N> string to_string(const bitset<N> &b, int x1=0, int x2=1e9){ string t = ""; for(int __iii__ = min(x1,SIZE(b)),  __jjj__ = min(x2, SIZE(b)-1); __iii__ <= __jjj__; ++__iii__){ t += b[__iii__] + '0'; } return '"' + t + '"'; } template <typename A, typename... C> string to_string(const A (&v), int x1=0, int x2=1e9, C... coords); int l_v_l_v_l = 0, t_a_b_s = 0; template <typename A, typename B> string to_string(const pair<A, B> &p) { l_v_l_v_l++; string res = "(" + to_string(p.first) + ", " + to_string(p.second) + ")"; l_v_l_v_l--; return res; } template <typename A, typename... C> string to_string(const A (&v), int x1, int x2, C... coords) { int rnk = rank<A>::value; string tab(t_a_b_s, ' '); string res = ""; bool first = true; if(l_v_l_v_l == 0) res += n_l; res += tab + "["; x1 = min(x1, SIZE(v)), x2 = min(x2, SIZE(v)); auto l = begin(v); advance(l, x1); auto r = l; advance(r, (x2-x1) + (x2 < SIZE(v))); for (auto e = l; e != r; e = next(e)) { if (!first) { res += ", "; } first = false; l_v_l_v_l++; if(e != l){ if(rnk > 1) { res += n_l; t_a_b_s = l_v_l_v_l; }; } else{ t_a_b_s = 0; } res += to_string(*e, coords...); l_v_l_v_l--; } res += "]"; if(l_v_l_v_l == 0) res += n_l; return res; } void dbgm(){;} template<typename Heads, typename... Tails> void dbgm(Heads H, Tails... T){ cout << to_string(H) << " | "; dbgm(T...); }
      |                                                                                                                                                                                                             ~~~^~~~~~~~~~
ho_t4.cpp: In function 'void solve()':
ho_t4.cpp:13:26: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   13 | #define REP(i,n) for(int (i) = 0; (i) < (n); (i)++)
      |                          ^
ho_t4.cpp:94:5: note: in expansion of macro 'REP'
   94 |     REP(i,m) {
      |     ^~~

Subtask #1
5.0 / 5.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 1620 KB Output is correct
2 Correct 12 ms 1608 KB Output is correct
3 Correct 83 ms 1952 KB Output is correct
4 Correct 87 ms 1748 KB Output is correct
5 Correct 3 ms 500 KB Output is correct
6 Correct 20 ms 1628 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 480 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 126 ms 1888 KB Output is correct
11 Correct 127 ms 1696 KB Output is correct
12 Correct 125 ms 1876 KB Output is correct
13 Correct 44 ms 1620 KB Output is correct
14 Correct 63 ms 1776 KB Output is correct
15 Correct 63 ms 1724 KB Output is correct
16 Correct 64 ms 1616 KB Output is correct

Subtask #2
11.0 / 11.0

# Verdict Execution time Memory Grader output
1 Correct 377 ms 6352 KB Output is correct
2 Correct 379 ms 7136 KB Output is correct
3 Correct 387 ms 7436 KB Output is correct
4 Correct 85 ms 1804 KB Output is correct
5 Correct 75 ms 1664 KB Output is correct
6 Correct 29 ms 1616 KB Output is correct
7 Correct 8 ms 1628 KB Output is correct
8 Correct 0 ms 348 KB Output is correct
9 Correct 332 ms 7808 KB Output is correct
10 Correct 326 ms 7372 KB Output is correct
11 Correct 354 ms 7568 KB Output is correct
12 Correct 352 ms 7472 KB Output is correct
13 Correct 349 ms 7772 KB Output is correct
14 Correct 367 ms 7628 KB Output is correct

Subtask #3
21.0 / 21.0

# Verdict Execution time Memory Grader output
1 Correct 89 ms 1620 KB Output is correct
2 Correct 31 ms 1684 KB Output is correct
3 Correct 384 ms 6204 KB Output is correct
4 Correct 23 ms 1616 KB Output is correct
5 Correct 582 ms 7284 KB Output is correct
6 Correct 0 ms 348 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 322 ms 7212 KB Output is correct
9 Correct 327 ms 7308 KB Output is correct
10 Correct 428 ms 7184 KB Output is correct
11 Correct 428 ms 7096 KB Output is correct
12 Correct 433 ms 7348 KB Output is correct
13 Correct 0 ms 348 KB Output is correct
14 Correct 0 ms 348 KB Output is correct
15 Correct 0 ms 348 KB Output is correct
16 Correct 0 ms 480 KB Output is correct
17 Correct 0 ms 348 KB Output is correct
18 Correct 0 ms 348 KB Output is correct
19 Correct 495 ms 7328 KB Output is correct
20 Correct 489 ms 7272 KB Output is correct
21 Correct 493 ms 7236 KB Output is correct
22 Correct 433 ms 7172 KB Output is correct

Subtask #4
63.0 / 63.0

# Verdict Execution time Memory Grader output
1 Correct 78 ms 1620 KB Output is correct
2 Correct 12 ms 1608 KB Output is correct
3 Correct 83 ms 1952 KB Output is correct
4 Correct 87 ms 1748 KB Output is correct
5 Correct 3 ms 500 KB Output is correct
6 Correct 20 ms 1628 KB Output is correct
7 Correct 0 ms 348 KB Output is correct
8 Correct 0 ms 480 KB Output is correct
9 Correct 1 ms 348 KB Output is correct
10 Correct 126 ms 1888 KB Output is correct
11 Correct 127 ms 1696 KB Output is correct
12 Correct 125 ms 1876 KB Output is correct
13 Correct 44 ms 1620 KB Output is correct
14 Correct 63 ms 1776 KB Output is correct
15 Correct 63 ms 1724 KB Output is correct
16 Correct 64 ms 1616 KB Output is correct
17 Correct 377 ms 6352 KB Output is correct
18 Correct 379 ms 7136 KB Output is correct
19 Correct 387 ms 7436 KB Output is correct
20 Correct 85 ms 1804 KB Output is correct
21 Correct 75 ms 1664 KB Output is correct
22 Correct 29 ms 1616 KB Output is correct
23 Correct 8 ms 1628 KB Output is correct
24 Correct 0 ms 348 KB Output is correct
25 Correct 332 ms 7808 KB Output is correct
26 Correct 326 ms 7372 KB Output is correct
27 Correct 354 ms 7568 KB Output is correct
28 Correct 352 ms 7472 KB Output is correct
29 Correct 349 ms 7772 KB Output is correct
30 Correct 367 ms 7628 KB Output is correct
31 Correct 89 ms 1620 KB Output is correct
32 Correct 31 ms 1684 KB Output is correct
33 Correct 384 ms 6204 KB Output is correct
34 Correct 23 ms 1616 KB Output is correct
35 Correct 582 ms 7284 KB Output is correct
36 Correct 0 ms 348 KB Output is correct
37 Correct 0 ms 348 KB Output is correct
38 Correct 322 ms 7212 KB Output is correct
39 Correct 327 ms 7308 KB Output is correct
40 Correct 428 ms 7184 KB Output is correct
41 Correct 428 ms 7096 KB Output is correct
42 Correct 433 ms 7348 KB Output is correct
43 Correct 0 ms 348 KB Output is correct
44 Correct 0 ms 348 KB Output is correct
45 Correct 0 ms 348 KB Output is correct
46 Correct 0 ms 480 KB Output is correct
47 Correct 0 ms 348 KB Output is correct
48 Correct 0 ms 348 KB Output is correct
49 Correct 495 ms 7328 KB Output is correct
50 Correct 489 ms 7272 KB Output is correct
51 Correct 493 ms 7236 KB Output is correct
52 Correct 433 ms 7172 KB Output is correct
53 Correct 372 ms 7396 KB Output is correct
54 Correct 380 ms 7464 KB Output is correct
55 Correct 376 ms 7396 KB Output is correct
56 Correct 82 ms 1620 KB Output is correct
57 Correct 79 ms 1620 KB Output is correct
58 Correct 559 ms 6484 KB Output is correct
59 Correct 560 ms 6364 KB Output is correct
60 Correct 568 ms 6292 KB Output is correct
61 Correct 572 ms 6188 KB Output is correct
62 Correct 575 ms 6348 KB Output is correct
63 Correct 574 ms 6108 KB Output is correct
64 Correct 652 ms 6324 KB Output is correct
65 Correct 649 ms 6380 KB Output is correct
66 Correct 622 ms 6240 KB Output is correct
67 Correct 13 ms 5492 KB Output is correct
68 Correct 334 ms 7492 KB Output is correct
69 Correct 340 ms 7508 KB Output is correct
70 Correct 349 ms 7464 KB Output is correct
71 Correct 352 ms 7460 KB Output is correct
72 Correct 353 ms 7672 KB Output is correct
73 Correct 346 ms 7648 KB Output is correct
74 Correct 353 ms 7540 KB Output is correct