oj.uz

Submission #153955

# Submission time Handle Problem Language Result Execution time Memory
153955 2019-09-17T14:56:25 Z mhy908 None (JOI14_ho_t4) C++14
25 / 100
 2000 ms 15548 KB 
#include <bits/stdc++.h>
#define F first
#define S second
#define pb push_back
#define mp make_pair
#define llinf 8987654321987654321
#define inf 1987654321
using namespace std;
typedef long long LL;
typedef pair<int, int> pii;
typedef pair<LL, LL> pll;
 
int h[100010];
LL dist[100010];
vector<int> link[100010], c[100010];
int n, m, x;
 
int main(){
	scanf("%d %d %d",&n, &m, &x);
	for(int i=1; i<=n; i++) scanf("%d", &h[i]);
	for(int i=1; i<=m; i++){
        int a, b, t;
		scanf("%d %d %d", &a, &b, &t);
		if(h[a]>=t){
            link[a].pb(b);
            c[a].pb(t);
		}
		if(h[b]>=t){
            link[b].pb(a);
            c[b].pb(t);
		}
	}
	for(int i=1; i<=n; i++)dist[i]=-llinf;
	priority_queue<pair<LL, int> > q;
	q.push({-(LL)x, -1});
	while(!q.empty()){
		int now=-q.top().S;
		LL dis=-q.top().F;
		q.pop();
		if(dist[now]>=dis)continue;
      	dist[now]=dis;
		for(int i=0; i<link[now].size(); i++){
			int u=link[now][i], co=c[now][i];
			//printf("%lld %d\n", min(dis-co, (LL)h[u]), u);
			q.push({-min(dis-co, (LL)h[u]), -u});
		}
	}
    //for(int i=1; i<=n; i++)printf("%lld ", dist[i]);
	if(dist[n]==-llinf)puts("-1");
	else printf("%lld", x+h[n]-dist[n]*2);
}

Compilation message

2014_ho_t4.cpp: In function 'int main()':
2014_ho_t4.cpp:42:17: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
   for(int i=0; i<link[now].size(); i++){
                ~^~~~~~~~~~~~~~~~~
2014_ho_t4.cpp:19:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d %d %d",&n, &m, &x);
  ~~~~~^~~~~~~~~~~~~~~~~~~~~~~
2014_ho_t4.cpp:20:31: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  for(int i=1; i<=n; i++) scanf("%d", &h[i]);
                          ~~~~~^~~~~~~~~~~~~
2014_ho_t4.cpp:23:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d %d", &a, &b, &t);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
25.0 / 25.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5112 KB Output is correct
2 Correct 153 ms 5340 KB Output is correct
3 Correct 92 ms 5368 KB Output is correct
4 Correct 11 ms 5112 KB Output is correct
5 Correct 43 ms 5112 KB Output is correct
6 Correct 7 ms 4988 KB Output is correct
7 Correct 7 ms 5112 KB Output is correct
8 Correct 126 ms 5248 KB Output is correct
9 Correct 206 ms 5112 KB Output is correct
10 Correct 194 ms 5240 KB Output is correct
11 Correct 8 ms 4984 KB Output is correct
12 Correct 148 ms 5368 KB Output is correct
13 Correct 169 ms 5288 KB Output is correct
14 Correct 17 ms 5116 KB Output is correct
15 Correct 138 ms 5212 KB Output is correct
16 Correct 6 ms 5112 KB Output is correct
17 Correct 9 ms 5084 KB Output is correct
18 Correct 9 ms 5112 KB Output is correct
19 Correct 7 ms 5052 KB Output is correct
20 Correct 8 ms 5084 KB Output is correct

Subtask #2
0 / 25.0

# Verdict Execution time Memory Grader output
1 Execution timed out 2037 ms 15548 KB Time limit exceeded
2 Halted 0 ms 0 KB -

Subtask #3
0 / 50.0

# Verdict Execution time Memory Grader output
1 Correct 7 ms 5112 KB Output is correct
2 Correct 153 ms 5340 KB Output is correct
3 Correct 92 ms 5368 KB Output is correct
4 Correct 11 ms 5112 KB Output is correct
5 Correct 43 ms 5112 KB Output is correct
6 Correct 7 ms 4988 KB Output is correct
7 Correct 7 ms 5112 KB Output is correct
8 Correct 126 ms 5248 KB Output is correct
9 Correct 206 ms 5112 KB Output is correct
10 Correct 194 ms 5240 KB Output is correct
11 Correct 8 ms 4984 KB Output is correct
12 Correct 148 ms 5368 KB Output is correct
13 Correct 169 ms 5288 KB Output is correct
14 Correct 17 ms 5116 KB Output is correct
15 Correct 138 ms 5212 KB Output is correct
16 Correct 6 ms 5112 KB Output is correct
17 Correct 9 ms 5084 KB Output is correct
18 Correct 9 ms 5112 KB Output is correct
19 Correct 7 ms 5052 KB Output is correct
20 Correct 8 ms 5084 KB Output is correct
21 Execution timed out 2037 ms 15548 KB Time limit exceeded
22 Halted 0 ms 0 KB -