#include "bits/stdc++.h"
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#define MAXN 100009
#define INF 1000000007
#define mp(x,y) make_pair(x,y)
#define all(v) v.begin(),v.end()
#define pb(x) push_back(x)
#define wr cout<<"----------------"<<endl;
#define ppb() pop_back()
#define tr(ii,c) for(__typeof((c).begin()) ii=(c).begin();ii!=(c).end();ii++)
#define ff first
#define ss second
#define my_little_dodge 46
#define debug(x) cerr<< #x <<" = "<< x<<endl;
using namespace std;
typedef long long ll;
typedef pair<int,int> PII;
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}
int arr[MAXN],dis[MAXN];
vector<int>adj[MAXN];
int main(){
//~ freopen("file.in", "r", stdin);
int n,m;
scanf("%d%d",&n,&m);
for(int i=1;i<=m;i++){
int u,v;
scanf("%d%d",&u,&v);
adj[u].pb(v);arr[i]=u;
}
priority_queue<pair<int,int> >q;
q.push(mp(0,arr[1]));
for(int i=0;i<n;i++)
dis[i]=INF;
dis[arr[1]]=0;
while(!q.empty()){
int val=-q.top().ff;
int nd=q.top().ss;
q.pop();
if(dis[nd]!=val)
continue;
tr(it,adj[nd]){
int cost=*it;
int blok=max(nd/(*it),(n-nd-1)/(*it));
for(int i=1;i<=blok;i++){
//~ if(nd-cost*i<0 and nd+cost*i>=n)
//~ break;
if(nd-cost*i>=0 and umin(dis[nd-cost*i],dis[nd]+i))
q.push(mp(-dis[nd-cost*i],nd-cost*i));
if(nd+cost*i<n and umin(dis[nd+cost*i],dis[nd]+i))
q.push(mp(-dis[nd+cost*i],nd+cost*i));
}
}
}
if(dis[arr[2]]==INF)
dis[arr[2]]=-1;
printf("%d\n",dis[arr[2]]);
return 0;
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:36:2: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
for(int i=0;i<n;i++)
^~~
skyscraper.cpp:38:3: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
dis[arr[1]]=0;
^~~
skyscraper.cpp:28:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&n,&m);
~~~~~^~~~~~~~~~~~~~
skyscraper.cpp:31:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d%d",&u,&v);
~~~~~^~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
2680 KB |
Output is correct |
| 2 |
Correct |
3 ms |
2852 KB |
Output is correct |
| 3 |
Correct |
3 ms |
2852 KB |
Output is correct |
| 4 |
Correct |
3 ms |
2852 KB |
Output is correct |
| 5 |
Correct |
4 ms |
2852 KB |
Output is correct |
| 6 |
Correct |
3 ms |
2864 KB |
Output is correct |
| 7 |
Correct |
3 ms |
2864 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
2864 KB |
Output is correct |
| 2 |
Correct |
3 ms |
2864 KB |
Output is correct |
| 3 |
Correct |
4 ms |
2868 KB |
Output is correct |
| 4 |
Correct |
3 ms |
2924 KB |
Output is correct |
| 5 |
Correct |
4 ms |
2924 KB |
Output is correct |
| 6 |
Correct |
3 ms |
2968 KB |
Output is correct |
| 7 |
Correct |
4 ms |
2968 KB |
Output is correct |
| 8 |
Correct |
4 ms |
2968 KB |
Output is correct |
| 9 |
Correct |
4 ms |
2968 KB |
Output is correct |
| 10 |
Correct |
4 ms |
2968 KB |
Output is correct |
| 11 |
Correct |
4 ms |
2976 KB |
Output is correct |
| 12 |
Correct |
5 ms |
2976 KB |
Output is correct |
| 13 |
Correct |
5 ms |
2976 KB |
Output is correct |
| 14 |
Correct |
4 ms |
2976 KB |
Output is correct |
| 15 |
Correct |
4 ms |
2976 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 2 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 3 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 4 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 5 |
Correct |
3 ms |
3064 KB |
Output is correct |
| 6 |
Correct |
3 ms |
3064 KB |
Output is correct |
| 7 |
Correct |
3 ms |
3064 KB |
Output is correct |
| 8 |
Correct |
3 ms |
3064 KB |
Output is correct |
| 9 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 10 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 11 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 12 |
Correct |
5 ms |
3064 KB |
Output is correct |
| 13 |
Correct |
5 ms |
3064 KB |
Output is correct |
| 14 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 15 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 16 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 17 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 18 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 19 |
Correct |
4 ms |
3064 KB |
Output is correct |
| 20 |
Correct |
21 ms |
3068 KB |
Output is correct |
| 21 |
Correct |
5 ms |
3068 KB |
Output is correct |
| 22 |
Correct |
4 ms |
3068 KB |
Output is correct |
| 23 |
Correct |
5 ms |
3068 KB |
Output is correct |
| 24 |
Correct |
6 ms |
3068 KB |
Output is correct |
| 25 |
Correct |
5 ms |
3068 KB |
Output is correct |
| 26 |
Correct |
19 ms |
3068 KB |
Output is correct |
| 27 |
Correct |
18 ms |
3068 KB |
Output is correct |
| 28 |
Correct |
4 ms |
3068 KB |
Output is correct |
| 29 |
Correct |
7 ms |
3068 KB |
Output is correct |
| 30 |
Correct |
4 ms |
3144 KB |
Output is correct |
| 31 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 32 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 33 |
Correct |
6 ms |
3148 KB |
Output is correct |
| 34 |
Correct |
6 ms |
3148 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
3148 KB |
Output is correct |
| 2 |
Correct |
3 ms |
3148 KB |
Output is correct |
| 3 |
Correct |
3 ms |
3148 KB |
Output is correct |
| 4 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 5 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 6 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 7 |
Correct |
3 ms |
3148 KB |
Output is correct |
| 8 |
Correct |
3 ms |
3148 KB |
Output is correct |
| 9 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 10 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 11 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 12 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 13 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 14 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 15 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 16 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 17 |
Correct |
6 ms |
3148 KB |
Output is correct |
| 18 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 19 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 20 |
Correct |
21 ms |
3148 KB |
Output is correct |
| 21 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 22 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 23 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 24 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 25 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 26 |
Correct |
24 ms |
3148 KB |
Output is correct |
| 27 |
Correct |
18 ms |
3148 KB |
Output is correct |
| 28 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 29 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 30 |
Correct |
4 ms |
3148 KB |
Output is correct |
| 31 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 32 |
Correct |
5 ms |
3148 KB |
Output is correct |
| 33 |
Correct |
6 ms |
3148 KB |
Output is correct |
| 34 |
Correct |
6 ms |
3196 KB |
Output is correct |
| 35 |
Correct |
12 ms |
3324 KB |
Output is correct |
| 36 |
Correct |
5 ms |
3324 KB |
Output is correct |
| 37 |
Correct |
11 ms |
3324 KB |
Output is correct |
| 38 |
Correct |
15 ms |
3452 KB |
Output is correct |
| 39 |
Correct |
15 ms |
3452 KB |
Output is correct |
| 40 |
Correct |
16 ms |
3452 KB |
Output is correct |
| 41 |
Correct |
19 ms |
3452 KB |
Output is correct |
| 42 |
Correct |
257 ms |
3452 KB |
Output is correct |
| 43 |
Correct |
287 ms |
3452 KB |
Output is correct |
| 44 |
Correct |
271 ms |
3452 KB |
Output is correct |
| 45 |
Correct |
21 ms |
3452 KB |
Output is correct |
| 46 |
Correct |
14 ms |
3452 KB |
Output is correct |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
3 ms |
3452 KB |
Output is correct |
| 2 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 3 |
Correct |
3 ms |
3452 KB |
Output is correct |
| 4 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 5 |
Correct |
3 ms |
3452 KB |
Output is correct |
| 6 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 7 |
Correct |
3 ms |
3452 KB |
Output is correct |
| 8 |
Correct |
3 ms |
3452 KB |
Output is correct |
| 9 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 10 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 11 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 12 |
Correct |
5 ms |
3452 KB |
Output is correct |
| 13 |
Correct |
5 ms |
3452 KB |
Output is correct |
| 14 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 15 |
Correct |
5 ms |
3452 KB |
Output is correct |
| 16 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 17 |
Correct |
5 ms |
3452 KB |
Output is correct |
| 18 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 19 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 20 |
Correct |
21 ms |
3452 KB |
Output is correct |
| 21 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 22 |
Correct |
4 ms |
3452 KB |
Output is correct |
| 23 |
Correct |
5 ms |
3452 KB |
Output is correct |
| 24 |
Correct |
5 ms |
3452 KB |
Output is correct |
| 25 |
Correct |
5 ms |
3452 KB |
Output is correct |
| 26 |
Correct |
25 ms |
3452 KB |
Output is correct |
| 27 |
Correct |
24 ms |
3452 KB |
Output is correct |
| 28 |
Correct |
5 ms |
3452 KB |
Output is correct |
| 29 |
Correct |
6 ms |
3452 KB |
Output is correct |
| 30 |
Correct |
6 ms |
3452 KB |
Output is correct |
| 31 |
Correct |
6 ms |
3452 KB |
Output is correct |
| 32 |
Correct |
6 ms |
3452 KB |
Output is correct |
| 33 |
Correct |
8 ms |
3452 KB |
Output is correct |
| 34 |
Correct |
7 ms |
3452 KB |
Output is correct |
| 35 |
Correct |
18 ms |
3452 KB |
Output is correct |
| 36 |
Correct |
7 ms |
3452 KB |
Output is correct |
| 37 |
Correct |
12 ms |
3452 KB |
Output is correct |
| 38 |
Correct |
15 ms |
3452 KB |
Output is correct |
| 39 |
Correct |
15 ms |
3452 KB |
Output is correct |
| 40 |
Correct |
16 ms |
3452 KB |
Output is correct |
| 41 |
Correct |
15 ms |
3452 KB |
Output is correct |
| 42 |
Correct |
260 ms |
3452 KB |
Output is correct |
| 43 |
Correct |
251 ms |
3452 KB |
Output is correct |
| 44 |
Correct |
255 ms |
3452 KB |
Output is correct |
| 45 |
Correct |
14 ms |
3548 KB |
Output is correct |
| 46 |
Correct |
19 ms |
3548 KB |
Output is correct |
| 47 |
Correct |
36 ms |
4088 KB |
Output is correct |
| 48 |
Correct |
12 ms |
4088 KB |
Output is correct |
| 49 |
Correct |
11 ms |
4088 KB |
Output is correct |
| 50 |
Correct |
9 ms |
4088 KB |
Output is correct |
| 51 |
Correct |
37 ms |
4856 KB |
Output is correct |
| 52 |
Correct |
37 ms |
4856 KB |
Output is correct |
| 53 |
Correct |
22 ms |
4856 KB |
Output is correct |
| 54 |
Correct |
6 ms |
4856 KB |
Output is correct |
| 55 |
Correct |
7 ms |
4856 KB |
Output is correct |
| 56 |
Execution timed out |
1079 ms |
4856 KB |
Time limit exceeded |
| 57 |
Halted |
0 ms |
0 KB |
- |
