/*
author: CRISTIANO RONALDO
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
typedef tree<int,null_type,less<int>,rb_tree_tag,
tree_order_statistics_node_update> indexed_set;
can do: find_by_order, order_of_key
__builtin_clz(x): the number of zeros at the beginning of the number
__builtin_ctz(x): the number of zeros at the end of the number
__builtin_popcount(x): the number of ones in the number
__builtin_parity(x): the parity (even or odd) of the number of ones
mt19937 rng(15);
mt19937 bruh(chrono::steady_clock::now().time_since_epoch().count());
mt19937_64 rofl(chrono::steady_clock::now().time_since_epoch().count());
*/
#include <bits/stdc++.h>
#define ll int
#define all(a) a.begin(), a.end()
#define F first
#define S second
#define pb push_back
#define ull unsigned long long
#define ld long double
#define lv v+v
#define rv v+v+1
#define files freopen("aa.txt", "r", stdin), freopen("aa.txt", "w", stdout)
#define pll pair <long long, long long>
#define pii pair <int, int>
using namespace std;
long long mod = 1e9 + 7;
const ll N = 3e4 + 10;
const ll M = 2e3 + 10;
const ll P = 337ll;
const ld EPS = 1e-7;
const ll block = 325;
const ll inf = 2e9;
ll n,m,b[N],p[N],cost[30001][2001], d[30010];
vector <ll> v[N];
vector <ll> road[2010];
bool used[30001];
// v[j] - куда может прыгнуть собака j
// cost[j][u] - цена прыжка собаки j в точку u
// road[j] - Какие собаки живут в точке j
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
cin>>n>>m;
for(ll i = 0; i<m; i++) {
cin>>b[i]>>p[i];
d[i] = inf;
road[b[i]].pb(i);
}
used[0]=true;
for(ll j = 0; j< 1; j++) {
cost[j][b[j]]=0;
v[j].pb(b[j]);
for(ll i = 1; b[j] + i * p[j] < n; i += 1) {
if(!road[b[j] + i * p[j]].empty()) {
cost[j][b[j] + i * p[j]] = i;
v[j].pb(b[j] + i * p[j]);
}
}
for(ll i = 1; b[j] - i * p[j] >= 0; i += 1) {
if(!road[b[j] - i * p[j]].empty()) {
cost[j][b[j] - i * p[j]] = i;
v[j].pb(b[j] - i * p[j]);
}
}
sort(all(v[j]));
}
set <pii> q;
q.insert({0,0});
d[0] = 0;
while(!q.empty()) {
ll ver = (*q.begin()).S; ll ttt = (*q.begin()).F; q.erase(q.begin());
if(!used[ver]) {
ll j = ver;
cost[j][b[j]]=0;
v[j].pb(b[j]);
for(ll i = 1; b[j] + i * p[j] < n; i += 1) {
if(!road[b[j] + i * p[j]].empty()) {
cost[j][b[j] + i * p[j]] = i;
v[j].pb(b[j] + i * p[j]);
}
}
for(ll i = 1; b[j] - i * p[j] >= 0; i += 1) {
if(!road[b[j] - i * p[j]].empty()) {
cost[j][b[j] - i * p[j]] = i;
v[j].pb(b[j] - i * p[j]);
}
}
used[ver] = true;
}
if(ttt > d[ver]) {continue;}
for(auto u : v[ver]) {
for(auto j : road[u]) {
if(d[j] > d[ver] + cost[ver][u]) {
d[j] = d[ver] + cost[ver][u];
q.insert({d[j], j});
}
}
}
}
cout<<(d[1] == inf ? -1 : d[1]);
return 0;
}
// equal, min, max, 1, random, build
/*
*/
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2648 KB |
Output is correct |
2 |
Correct |
1 ms |
2652 KB |
Output is correct |
3 |
Correct |
1 ms |
2652 KB |
Output is correct |
4 |
Correct |
0 ms |
2652 KB |
Output is correct |
5 |
Correct |
1 ms |
2652 KB |
Output is correct |
6 |
Correct |
0 ms |
2652 KB |
Output is correct |
7 |
Correct |
1 ms |
2652 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2652 KB |
Output is correct |
2 |
Correct |
0 ms |
2652 KB |
Output is correct |
3 |
Correct |
1 ms |
2652 KB |
Output is correct |
4 |
Correct |
1 ms |
2652 KB |
Output is correct |
5 |
Correct |
0 ms |
2652 KB |
Output is correct |
6 |
Correct |
1 ms |
2648 KB |
Output is correct |
7 |
Correct |
1 ms |
2648 KB |
Output is correct |
8 |
Correct |
0 ms |
2652 KB |
Output is correct |
9 |
Correct |
1 ms |
2648 KB |
Output is correct |
10 |
Correct |
1 ms |
4700 KB |
Output is correct |
11 |
Correct |
4 ms |
10588 KB |
Output is correct |
12 |
Correct |
7 ms |
11608 KB |
Output is correct |
13 |
Correct |
7 ms |
15196 KB |
Output is correct |
14 |
Correct |
4 ms |
13404 KB |
Output is correct |
15 |
Correct |
3 ms |
14172 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2904 KB |
Output is correct |
2 |
Correct |
1 ms |
2652 KB |
Output is correct |
3 |
Correct |
1 ms |
2652 KB |
Output is correct |
4 |
Correct |
0 ms |
2652 KB |
Output is correct |
5 |
Correct |
1 ms |
2652 KB |
Output is correct |
6 |
Correct |
1 ms |
2652 KB |
Output is correct |
7 |
Correct |
1 ms |
2652 KB |
Output is correct |
8 |
Correct |
1 ms |
2652 KB |
Output is correct |
9 |
Correct |
1 ms |
2652 KB |
Output is correct |
10 |
Correct |
1 ms |
4696 KB |
Output is correct |
11 |
Correct |
3 ms |
14172 KB |
Output is correct |
12 |
Correct |
6 ms |
15196 KB |
Output is correct |
13 |
Correct |
7 ms |
16240 KB |
Output is correct |
14 |
Correct |
3 ms |
14176 KB |
Output is correct |
15 |
Correct |
3 ms |
15196 KB |
Output is correct |
16 |
Correct |
0 ms |
2652 KB |
Output is correct |
17 |
Correct |
5 ms |
13588 KB |
Output is correct |
18 |
Correct |
1 ms |
4700 KB |
Output is correct |
19 |
Correct |
1 ms |
6748 KB |
Output is correct |
20 |
Correct |
28 ms |
33116 KB |
Output is correct |
21 |
Correct |
1 ms |
8796 KB |
Output is correct |
22 |
Correct |
1 ms |
2652 KB |
Output is correct |
23 |
Correct |
2 ms |
8028 KB |
Output is correct |
24 |
Correct |
4 ms |
14684 KB |
Output is correct |
25 |
Correct |
4 ms |
15964 KB |
Output is correct |
26 |
Correct |
10 ms |
17852 KB |
Output is correct |
27 |
Correct |
10 ms |
17500 KB |
Output is correct |
28 |
Correct |
3 ms |
16732 KB |
Output is correct |
29 |
Correct |
1 ms |
8796 KB |
Output is correct |
30 |
Correct |
1 ms |
4700 KB |
Output is correct |
31 |
Correct |
1 ms |
6748 KB |
Output is correct |
32 |
Correct |
1 ms |
6808 KB |
Output is correct |
33 |
Correct |
4 ms |
12380 KB |
Output is correct |
34 |
Correct |
5 ms |
12380 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2652 KB |
Output is correct |
2 |
Correct |
1 ms |
2652 KB |
Output is correct |
3 |
Correct |
1 ms |
2652 KB |
Output is correct |
4 |
Correct |
0 ms |
2652 KB |
Output is correct |
5 |
Correct |
0 ms |
2652 KB |
Output is correct |
6 |
Correct |
1 ms |
2652 KB |
Output is correct |
7 |
Correct |
1 ms |
2652 KB |
Output is correct |
8 |
Correct |
0 ms |
2652 KB |
Output is correct |
9 |
Correct |
1 ms |
2648 KB |
Output is correct |
10 |
Correct |
1 ms |
4696 KB |
Output is correct |
11 |
Correct |
4 ms |
12420 KB |
Output is correct |
12 |
Correct |
6 ms |
16220 KB |
Output is correct |
13 |
Correct |
7 ms |
16220 KB |
Output is correct |
14 |
Correct |
3 ms |
16284 KB |
Output is correct |
15 |
Correct |
4 ms |
12380 KB |
Output is correct |
16 |
Correct |
1 ms |
2652 KB |
Output is correct |
17 |
Correct |
5 ms |
12512 KB |
Output is correct |
18 |
Correct |
1 ms |
4700 KB |
Output is correct |
19 |
Correct |
1 ms |
6732 KB |
Output is correct |
20 |
Correct |
32 ms |
33108 KB |
Output is correct |
21 |
Correct |
1 ms |
4700 KB |
Output is correct |
22 |
Correct |
1 ms |
2652 KB |
Output is correct |
23 |
Correct |
2 ms |
7516 KB |
Output is correct |
24 |
Correct |
5 ms |
14940 KB |
Output is correct |
25 |
Correct |
5 ms |
15192 KB |
Output is correct |
26 |
Correct |
14 ms |
17884 KB |
Output is correct |
27 |
Correct |
12 ms |
17400 KB |
Output is correct |
28 |
Correct |
3 ms |
15964 KB |
Output is correct |
29 |
Correct |
1 ms |
7004 KB |
Output is correct |
30 |
Correct |
1 ms |
4700 KB |
Output is correct |
31 |
Correct |
1 ms |
5212 KB |
Output is correct |
32 |
Correct |
1 ms |
4956 KB |
Output is correct |
33 |
Correct |
4 ms |
10332 KB |
Output is correct |
34 |
Correct |
4 ms |
11356 KB |
Output is correct |
35 |
Correct |
76 ms |
159796 KB |
Output is correct |
36 |
Correct |
11 ms |
29276 KB |
Output is correct |
37 |
Correct |
77 ms |
156368 KB |
Output is correct |
38 |
Correct |
107 ms |
211024 KB |
Output is correct |
39 |
Correct |
105 ms |
209748 KB |
Output is correct |
40 |
Correct |
101 ms |
211028 KB |
Output is correct |
41 |
Correct |
100 ms |
211280 KB |
Output is correct |
42 |
Correct |
757 ms |
251820 KB |
Output is correct |
43 |
Correct |
872 ms |
244564 KB |
Output is correct |
44 |
Runtime error |
574 ms |
262144 KB |
Execution killed with signal 9 |
45 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
2652 KB |
Output is correct |
2 |
Correct |
1 ms |
2652 KB |
Output is correct |
3 |
Correct |
1 ms |
2652 KB |
Output is correct |
4 |
Correct |
1 ms |
2652 KB |
Output is correct |
5 |
Correct |
0 ms |
2652 KB |
Output is correct |
6 |
Correct |
0 ms |
2652 KB |
Output is correct |
7 |
Correct |
0 ms |
2652 KB |
Output is correct |
8 |
Correct |
0 ms |
2652 KB |
Output is correct |
9 |
Correct |
1 ms |
2648 KB |
Output is correct |
10 |
Correct |
1 ms |
4700 KB |
Output is correct |
11 |
Correct |
3 ms |
14168 KB |
Output is correct |
12 |
Correct |
5 ms |
15196 KB |
Output is correct |
13 |
Correct |
7 ms |
15196 KB |
Output is correct |
14 |
Correct |
3 ms |
14172 KB |
Output is correct |
15 |
Correct |
3 ms |
15196 KB |
Output is correct |
16 |
Correct |
1 ms |
2652 KB |
Output is correct |
17 |
Correct |
3 ms |
15452 KB |
Output is correct |
18 |
Correct |
1 ms |
4700 KB |
Output is correct |
19 |
Correct |
1 ms |
6748 KB |
Output is correct |
20 |
Correct |
29 ms |
33116 KB |
Output is correct |
21 |
Correct |
1 ms |
8796 KB |
Output is correct |
22 |
Correct |
1 ms |
2652 KB |
Output is correct |
23 |
Correct |
1 ms |
8952 KB |
Output is correct |
24 |
Correct |
4 ms |
14172 KB |
Output is correct |
25 |
Correct |
4 ms |
14172 KB |
Output is correct |
26 |
Correct |
12 ms |
17788 KB |
Output is correct |
27 |
Correct |
13 ms |
17360 KB |
Output is correct |
28 |
Correct |
4 ms |
15196 KB |
Output is correct |
29 |
Correct |
1 ms |
7004 KB |
Output is correct |
30 |
Correct |
1 ms |
4700 KB |
Output is correct |
31 |
Correct |
1 ms |
6748 KB |
Output is correct |
32 |
Correct |
1 ms |
6748 KB |
Output is correct |
33 |
Correct |
6 ms |
12380 KB |
Output is correct |
34 |
Correct |
4 ms |
12380 KB |
Output is correct |
35 |
Correct |
77 ms |
160308 KB |
Output is correct |
36 |
Correct |
11 ms |
31324 KB |
Output is correct |
37 |
Correct |
73 ms |
156356 KB |
Output is correct |
38 |
Correct |
104 ms |
211220 KB |
Output is correct |
39 |
Correct |
100 ms |
210512 KB |
Output is correct |
40 |
Correct |
103 ms |
211284 KB |
Output is correct |
41 |
Correct |
101 ms |
211540 KB |
Output is correct |
42 |
Correct |
754 ms |
251984 KB |
Output is correct |
43 |
Correct |
752 ms |
244444 KB |
Output is correct |
44 |
Runtime error |
551 ms |
262144 KB |
Execution killed with signal 9 |
45 |
Halted |
0 ms |
0 KB |
- |