#include <bits/stdc++.h>
using namespace std;
#define ll long long
#define ull unsigned long long
#define pb(e) push_back(e)
#define sv(a) sort(a.begin(),a.end())
#define sa(a,n) sort(a,a+n)
#define mp(a,b) make_pair(a,b)
#define vf first
#define vs second
#define ar array
#define all(x) x.begin(),x.end()
const int inf = 0x3f3f3f3f;
const int mod = 998244353;
const double PI=3.14159265358979323846264338327950288419716939937510582097494459230;
bool remender(ll a , ll b){return a%b;}
//freopen("problemname.in", "r", stdin);
//freopen("problemname.out", "w", stdout);
void solve(){
int n , m1;
cin >> n >> m1;
vector<vector<int>> v(n);
map<pair<int,int>,int> m;
int dis[n];
memset(dis,0,sizeof dis);
int s , e;
for(int i = 0; i < m1; i++){
int b,p;
cin >> b >> p;
if(i == 0)s = b;
v[b].pb(p);
if(i == 1)e = b;
}
queue<array<int,3>> q;
memset(dis,-1,sizeof dis);
dis[s] = 0;
for(int i : v[s]){
if(m[{s,i}] == 0){
m[{s,i}] = 1;
array<int,3> lol = {s,i,0};
q.push(lol);
}
}
while(q.size()){
array<int,3> p = q.front();
q.pop();
if(p[0] + p[1] < n && m[{p[0]+p[1] , p[1]}] == 0){
m[{p[0]+p[1] , p[1]}] = 1;
array<int,3> lol = {p[0]+p[1],p[1],p[2]+1};
q.push(lol);
if(dis[p[0]+p[1]] == -1){
dis[p[0]+p[1]] = p[2]+1;
for(int i : v[p[0]+p[1]]){
if(m[{p[0]+p[1],i}]==0){
m[{p[0]+p[1],i}] = 1;
array<int,3> again = {p[0]+p[1] , i , dis[p[0]+p[1]]};
q.push(again);
}
}
}
}
if(p[0] - p[1] >=0 && m[{p[0]-p[1] , p[1]}] == 0){
m[{p[0]-p[1] , p[1]}] = 1;
array<int,3> lol = {p[0]-p[1],p[1],p[2]+1};
q.push(lol);
if(dis[p[0]-p[1]] == -1){
dis[p[0]-p[1]] = p[2]+1;
for(int i : v[p[0]-p[1]]){
if(m[{p[0]-p[1],i}] == 0){
m[{p[0]-p[1],i}] = 1;
array<int,3> again = {p[0]-p[1] , i , dis[p[0]-p[1]]};
q.push(again);
}
}
}
}
}
cout << dis[e] << '\n';
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
//int t;cin >> t;while(t--)
solve();
return 0;
}
Compilation message
skyscraper.cpp: In function 'void solve()':
skyscraper.cpp:80:20: warning: 'e' may be used uninitialized in this function [-Wmaybe-uninitialized]
80 | cout << dis[e] << '\n';
| ^~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
1 ms |
212 KB |
Output is correct |
3 |
Correct |
1 ms |
256 KB |
Output is correct |
4 |
Correct |
1 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
2 ms |
596 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
4 ms |
596 KB |
Output is correct |
15 |
Correct |
3 ms |
724 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
1 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
2 ms |
596 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
4 ms |
596 KB |
Output is correct |
15 |
Correct |
3 ms |
596 KB |
Output is correct |
16 |
Correct |
1 ms |
340 KB |
Output is correct |
17 |
Correct |
9 ms |
1260 KB |
Output is correct |
18 |
Correct |
1 ms |
340 KB |
Output is correct |
19 |
Correct |
1 ms |
340 KB |
Output is correct |
20 |
Correct |
1 ms |
468 KB |
Output is correct |
21 |
Correct |
1 ms |
340 KB |
Output is correct |
22 |
Correct |
1 ms |
340 KB |
Output is correct |
23 |
Correct |
4 ms |
724 KB |
Output is correct |
24 |
Correct |
7 ms |
1108 KB |
Output is correct |
25 |
Correct |
4 ms |
852 KB |
Output is correct |
26 |
Correct |
4 ms |
852 KB |
Output is correct |
27 |
Correct |
3 ms |
724 KB |
Output is correct |
28 |
Correct |
13 ms |
1748 KB |
Output is correct |
29 |
Correct |
37 ms |
4152 KB |
Output is correct |
30 |
Correct |
8 ms |
1364 KB |
Output is correct |
31 |
Correct |
17 ms |
2412 KB |
Output is correct |
32 |
Correct |
11 ms |
1748 KB |
Output is correct |
33 |
Correct |
76 ms |
7868 KB |
Output is correct |
34 |
Correct |
79 ms |
7784 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
1 ms |
212 KB |
Output is correct |
9 |
Correct |
1 ms |
340 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
2 ms |
596 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
3 ms |
596 KB |
Output is correct |
15 |
Correct |
3 ms |
596 KB |
Output is correct |
16 |
Correct |
1 ms |
212 KB |
Output is correct |
17 |
Correct |
7 ms |
1236 KB |
Output is correct |
18 |
Correct |
1 ms |
340 KB |
Output is correct |
19 |
Correct |
1 ms |
340 KB |
Output is correct |
20 |
Correct |
2 ms |
468 KB |
Output is correct |
21 |
Correct |
1 ms |
340 KB |
Output is correct |
22 |
Correct |
1 ms |
340 KB |
Output is correct |
23 |
Correct |
4 ms |
724 KB |
Output is correct |
24 |
Correct |
7 ms |
1108 KB |
Output is correct |
25 |
Correct |
4 ms |
852 KB |
Output is correct |
26 |
Correct |
5 ms |
852 KB |
Output is correct |
27 |
Correct |
4 ms |
724 KB |
Output is correct |
28 |
Correct |
11 ms |
1748 KB |
Output is correct |
29 |
Correct |
31 ms |
4060 KB |
Output is correct |
30 |
Correct |
8 ms |
1364 KB |
Output is correct |
31 |
Correct |
15 ms |
2420 KB |
Output is correct |
32 |
Correct |
14 ms |
1728 KB |
Output is correct |
33 |
Correct |
77 ms |
7816 KB |
Output is correct |
34 |
Correct |
81 ms |
7804 KB |
Output is correct |
35 |
Correct |
107 ms |
6896 KB |
Output is correct |
36 |
Correct |
11 ms |
1492 KB |
Output is correct |
37 |
Correct |
160 ms |
11236 KB |
Output is correct |
38 |
Correct |
137 ms |
10660 KB |
Output is correct |
39 |
Correct |
148 ms |
10648 KB |
Output is correct |
40 |
Correct |
163 ms |
10572 KB |
Output is correct |
41 |
Correct |
137 ms |
10652 KB |
Output is correct |
42 |
Correct |
8 ms |
980 KB |
Output is correct |
43 |
Correct |
7 ms |
852 KB |
Output is correct |
44 |
Correct |
7 ms |
596 KB |
Output is correct |
45 |
Correct |
551 ms |
30648 KB |
Output is correct |
46 |
Correct |
602 ms |
30656 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Correct |
0 ms |
212 KB |
Output is correct |
3 |
Correct |
0 ms |
212 KB |
Output is correct |
4 |
Correct |
0 ms |
212 KB |
Output is correct |
5 |
Correct |
0 ms |
212 KB |
Output is correct |
6 |
Correct |
0 ms |
212 KB |
Output is correct |
7 |
Correct |
0 ms |
212 KB |
Output is correct |
8 |
Correct |
0 ms |
212 KB |
Output is correct |
9 |
Correct |
0 ms |
212 KB |
Output is correct |
10 |
Correct |
1 ms |
340 KB |
Output is correct |
11 |
Correct |
2 ms |
596 KB |
Output is correct |
12 |
Correct |
1 ms |
340 KB |
Output is correct |
13 |
Correct |
1 ms |
340 KB |
Output is correct |
14 |
Correct |
3 ms |
596 KB |
Output is correct |
15 |
Correct |
3 ms |
596 KB |
Output is correct |
16 |
Correct |
1 ms |
212 KB |
Output is correct |
17 |
Correct |
10 ms |
1236 KB |
Output is correct |
18 |
Correct |
1 ms |
340 KB |
Output is correct |
19 |
Correct |
1 ms |
340 KB |
Output is correct |
20 |
Correct |
1 ms |
468 KB |
Output is correct |
21 |
Correct |
1 ms |
340 KB |
Output is correct |
22 |
Correct |
1 ms |
340 KB |
Output is correct |
23 |
Correct |
4 ms |
724 KB |
Output is correct |
24 |
Correct |
7 ms |
1108 KB |
Output is correct |
25 |
Correct |
4 ms |
848 KB |
Output is correct |
26 |
Correct |
4 ms |
852 KB |
Output is correct |
27 |
Correct |
3 ms |
724 KB |
Output is correct |
28 |
Correct |
13 ms |
1780 KB |
Output is correct |
29 |
Correct |
34 ms |
4180 KB |
Output is correct |
30 |
Correct |
8 ms |
1428 KB |
Output is correct |
31 |
Correct |
16 ms |
2388 KB |
Output is correct |
32 |
Correct |
12 ms |
1784 KB |
Output is correct |
33 |
Correct |
88 ms |
7868 KB |
Output is correct |
34 |
Correct |
89 ms |
7884 KB |
Output is correct |
35 |
Correct |
81 ms |
6876 KB |
Output is correct |
36 |
Correct |
12 ms |
1492 KB |
Output is correct |
37 |
Correct |
189 ms |
11296 KB |
Output is correct |
38 |
Correct |
158 ms |
10600 KB |
Output is correct |
39 |
Correct |
162 ms |
10576 KB |
Output is correct |
40 |
Correct |
184 ms |
10572 KB |
Output is correct |
41 |
Correct |
163 ms |
10644 KB |
Output is correct |
42 |
Correct |
8 ms |
980 KB |
Output is correct |
43 |
Correct |
10 ms |
868 KB |
Output is correct |
44 |
Correct |
7 ms |
596 KB |
Output is correct |
45 |
Correct |
526 ms |
30628 KB |
Output is correct |
46 |
Correct |
596 ms |
30728 KB |
Output is correct |
47 |
Execution timed out |
1095 ms |
41308 KB |
Time limit exceeded |
48 |
Halted |
0 ms |
0 KB |
- |