oj.uz

Submission #768355

# Submission time Handle Problem Language Result Execution time Memory
768355 2023-06-28T01:42:46 Z hgmhc None (JOI14_ho_t4) C++17
25 / 100
 129 ms 13888 KB 
#include <bits/stdc++.h>
#define rep(i,a,b) for (auto i = (a); i <= (b); ++i)
#define Mup(x,y) x = max(x,y)
#define mup(x,y) x = min(x,y)
#define all(x) begin(x),end(x)
#define per(i,a,b) for (auto i = (b); i >= (a); --i)
using namespace std;
using ll = long long;
using ii = pair<int,int>;
#define dbg(...) fprintf(stderr,__VA_ARGS__)

const ll INF = 1e18;
const int N = 1e5+3;
int n, m, x, h[N];
vector<ii> adj[N];
ll dist[N];

int main() {
    scanf("%d%d%d", &n, &m, &x);
    rep(i,1,n) scanf("%d", &h[i]);
    rep(i,1,m) {
        int u, v, t;
        scanf("%d%d%d", &u, &v, &t);
        adj[u].push_back({v,t});
        adj[v].push_back({u,t});
    }
    fill(dist,dist+N,INF);
    priority_queue<pair<ll,int>> pq;
    dist[1] = 0, pq.push({0,1});
    while (not empty(pq)) {
        auto [d,a] = pq.top(); pq.pop(), d=-d;
        if (dist[a] < d) continue;
        for (auto [b,w] : adj[a]) if (h[a] >= w) {
            if (dist[a] < x) {
                if (x-dist[a] >= w) {
                    dist[b] = max(dist[a]+w,0LL+x-h[b]);
                } else {
                    dist[b] = dist[a]+w-(x-dist[a])+w;
                }
                pq.push({-dist[b],b});
            }
            else if (dist[b] > dist[a]+2*w) {
                dist[b] = dist[a]+2*w;
                pq.push({-dist[b],b});
            }
        }
    }
    if (h[n]+dist[n] >= INF) puts("-1");
    else printf("%lld", h[n]+dist[n]);
}

Compilation message

2014_ho_t4.cpp: In function 'int main()':
2014_ho_t4.cpp:19:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   19 |     scanf("%d%d%d", &n, &m, &x);
      |     ~~~~~^~~~~~~~~~~~~~~~~~~~~~
2014_ho_t4.cpp:20:21: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   20 |     rep(i,1,n) scanf("%d", &h[i]);
      |                ~~~~~^~~~~~~~~~~~~
2014_ho_t4.cpp:23:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   23 |         scanf("%d%d%d", &u, &v, &t);
      |         ~~~~~^~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 3 ms 3540 KB Output is correct
3 Incorrect 3 ms 3540 KB Output isn't correct
4 Halted 0 ms 0 KB -

Subtask #2
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 129 ms 12652 KB Output is correct
2 Correct 104 ms 12936 KB Output is correct
3 Correct 73 ms 8628 KB Output is correct
4 Correct 110 ms 13888 KB Output is correct
5 Correct 87 ms 12508 KB Output is correct
6 Correct 6 ms 3796 KB Output is correct
7 Correct 116 ms 12472 KB Output is correct
8 Correct 105 ms 11872 KB Output is correct
9 Correct 111 ms 12068 KB Output is correct
10 Correct 73 ms 10076 KB Output is correct
11 Correct 14 ms 4436 KB Output is correct
12 Correct 65 ms 9292 KB Output is correct
13 Correct 30 ms 7844 KB Output is correct
14 Correct 103 ms 12436 KB Output is correct
15 Correct 4 ms 3540 KB Output is correct
16 Correct 96 ms 12592 KB Output is correct
17 Correct 15 ms 4052 KB Output is correct
18 Correct 12 ms 4160 KB Output is correct
19 Correct 41 ms 7052 KB Output is correct
20 Correct 14 ms 4436 KB Output is correct

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 2 ms 3412 KB Output is correct
2 Correct 3 ms 3540 KB Output is correct
3 Incorrect 3 ms 3540 KB Output isn't correct
4 Halted 0 ms 0 KB -