oj.uz

답안 #768352

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
768352 2023-06-28T01:08:51 Z hgmhc 날다람쥐 (JOI14_ho_t4) C++17
25 / 100
 147 ms 19380 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) <= h[b]) {
                    dist[b] = dist[a]+w;
                } else {
                    dist[b] = x-h[b];
                }
                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

# 결과 실행 시간 메모리 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

# 결과 실행 시간 메모리 Grader output
1 Correct 147 ms 19380 KB Output is correct
2 Correct 93 ms 18124 KB Output is correct
3 Correct 66 ms 11548 KB Output is correct
4 Correct 111 ms 18372 KB Output is correct
5 Correct 94 ms 17004 KB Output is correct
6 Correct 7 ms 4180 KB Output is correct
7 Correct 108 ms 17860 KB Output is correct
8 Correct 114 ms 16788 KB Output is correct
9 Correct 110 ms 18004 KB Output is correct
10 Correct 71 ms 13976 KB Output is correct
11 Correct 13 ms 4820 KB Output is correct
12 Correct 65 ms 13320 KB Output is correct
13 Correct 31 ms 9468 KB Output is correct
14 Correct 104 ms 17516 KB Output is correct
15 Correct 5 ms 3844 KB Output is correct
16 Correct 84 ms 16444 KB Output is correct
17 Correct 11 ms 4716 KB Output is correct
18 Correct 12 ms 4948 KB Output is correct
19 Correct 44 ms 9640 KB Output is correct
20 Correct 15 ms 4948 KB Output is correct

Subtask #3
0 / 50.0

# 결과 실행 시간 메모리 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 -