Submission #806979

#	Time	Username	Problem	Language	Result	Execution time	Memory
806979		YassineBenYounes	Escape Route (JOI21_escape_route)	C++17	5 / 100	9084 ms	111996 KiB

escape_route

#include<bits/stdc++.h>
#include<escape_route.h>
typedef long long ll;
using namespace std;

void init(){
    #ifndef ONLINE_JUDGE
 
freopen("input.txt", "r", stdin);
 
freopen("output.txt", "w", stdout);
 
#endif // ONLINE_JUDGE

}
#define vi vector<int>
#define vl vector<ll>
#define pb push_back
#define pii pair<int, int>
#define pll pair<ll, ll>
#define ff first
#define ss second
const int mx = 100;
const ll inf = 1e18;

vector<vl> graph[mx];

vector<vl> queries[mx];

bool vis[mx];
ll s;
int n, m, q;
ll ans[mx];

void solve(int st, int target, ll t){
    priority_queue<pll, vector<pll>, greater<pll>> pq;
    pq.push({t, st});
    memset(vis, 0, sizeof vis);
    for(int i = 0; i < n;i++){
        ans[i] = inf;
    }
    ans[st] = t;
    while(!pq.empty()){
        int node = pq.top().ss;
        ll tm = pq.top().ff;
        pq.pop();
        if(vis[node])continue;
        vis[node] = 1;
        for(vl adj : graph[node]){
            ll nxt = tm + adj[1];
            if(adj[1] > adj[2])continue;
            ll o = nxt % s;
            if((nxt/s) > (tm/s) || o > adj[2]){
                nxt = (tm / s + 1) * s + adj[1];
            }
            ans[adj[0]] = min(ans[adj[0]], nxt);
            pq.push({ans[adj[0]], adj[0]});
        }
    }
    //cout << ans[2] << endl;
}

std::vector<long long> calculate_necessary_time(
int N, int M, long long S, int Q, std::vector<int> A, std::vector<int> B,
std::vector<long long> L, std::vector<long long> C, std::vector<int> U,
std::vector<int> V, std::vector<long long> T){
    n = N, m = M, s = S, q = Q;
    for(int i = 0; i < m;i++){
        graph[A[i]].pb({B[i], L[i], C[i]});
        graph[B[i]].pb({A[i], L[i], C[i]});
    }
    vl res;
    for(int i = 0; i < q;i++){
        solve(U[i], V[i], T[i]);
        res.pb(ans[V[i]] - T[i]);
    }
    return res;
}

Compilation message (stderr)

escape_route.cpp: In function 'void init()':
escape_route.cpp:9:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
    9 | freopen("input.txt", "r", stdin);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
escape_route.cpp:11:8: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   11 | freopen("output.txt", "w", stdout);
      | ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 0 / 20
• Subtask 3: 0 / 10
• Subtask 4: 0 / 35
• Subtask 5: 0 / 30