#include <bits/stdc++.h>
using namespace std;
void just_do_it();
int main() {
#ifdef KAMIRULEZ
freopen("kamirulez.inp", "r", stdin);
freopen("kamirulez.out", "w", stdout);
#endif
ios_base::sync_with_stdio(0);
cin.tie(0);
just_do_it();
return 0;
}
const int maxN = 3e4 + 20;
const int maxC = 1e7 + 20;
const int inf = 1e9 + 20;
int B[maxN];
int P[maxN];
vector<pair<int, int>> adj[maxC];
int dist[maxC];
void just_do_it() {
int N, M;
cin >> N >> M;
const int lim = 0;
int cnt = N;
for (int i = 0; i < M; i++) {
cin >> B[i] >> P[i];
if (P[i] > lim) {
int cur = B[i] % P[i];
int nxt = cur + P[i];
for (; cur < N; cur += P[i], nxt += P[i]) {
if (nxt < N) {
adj[cnt].emplace_back(cnt + 1, 1);
adj[cnt + 1].emplace_back(cnt, 1);
}
if (cur == B[i]) {
adj[B[i]].emplace_back(cnt, 0);
}
adj[cnt].emplace_back(cur, 0);
cnt++;
}
}
}
assert(cnt < maxC);
for (int i = 0; i < cnt; i++) {
dist[i] = inf;
}
dist[B[0]] = 0;
deque<int> q = {B[0]};
while (!q.empty()) {
int u = q.front();
q.pop_front();
for (auto p: adj[u]) {
int v = p.first;
int w = p.second;
if (dist[u] + w < dist[v]) {
dist[v] = dist[u] + w;
if (w == 0) {
q.push_front(v);
}
else {
q.push_back(v);
}
}
}
}
if (dist[B[1]] == inf) {
cout << -1;
}
else {
cout << dist[B[1]];
}
}
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
104 ms |
235140 KB |
Output is correct |
2 |
Correct |
114 ms |
235148 KB |
Output is correct |
3 |
Correct |
111 ms |
235120 KB |
Output is correct |
4 |
Correct |
109 ms |
235092 KB |
Output is correct |
5 |
Correct |
109 ms |
235036 KB |
Output is correct |
6 |
Correct |
114 ms |
235048 KB |
Output is correct |
7 |
Correct |
112 ms |
235224 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
109 ms |
235060 KB |
Output is correct |
2 |
Correct |
108 ms |
235128 KB |
Output is correct |
3 |
Correct |
111 ms |
235192 KB |
Output is correct |
4 |
Correct |
106 ms |
235048 KB |
Output is correct |
5 |
Correct |
106 ms |
235144 KB |
Output is correct |
6 |
Correct |
105 ms |
235144 KB |
Output is correct |
7 |
Correct |
107 ms |
235164 KB |
Output is correct |
8 |
Correct |
114 ms |
235156 KB |
Output is correct |
9 |
Correct |
110 ms |
235184 KB |
Output is correct |
10 |
Correct |
113 ms |
235212 KB |
Output is correct |
11 |
Correct |
117 ms |
235612 KB |
Output is correct |
12 |
Correct |
146 ms |
245180 KB |
Output is correct |
13 |
Correct |
144 ms |
245340 KB |
Output is correct |
14 |
Correct |
108 ms |
235408 KB |
Output is correct |
15 |
Correct |
108 ms |
235404 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
109 ms |
235064 KB |
Output is correct |
2 |
Correct |
108 ms |
235180 KB |
Output is correct |
3 |
Correct |
122 ms |
235084 KB |
Output is correct |
4 |
Correct |
107 ms |
235148 KB |
Output is correct |
5 |
Correct |
111 ms |
235160 KB |
Output is correct |
6 |
Correct |
108 ms |
235096 KB |
Output is correct |
7 |
Correct |
110 ms |
235072 KB |
Output is correct |
8 |
Correct |
107 ms |
235108 KB |
Output is correct |
9 |
Correct |
111 ms |
235132 KB |
Output is correct |
10 |
Correct |
117 ms |
235212 KB |
Output is correct |
11 |
Correct |
109 ms |
235664 KB |
Output is correct |
12 |
Correct |
144 ms |
245128 KB |
Output is correct |
13 |
Correct |
155 ms |
245328 KB |
Output is correct |
14 |
Correct |
114 ms |
235428 KB |
Output is correct |
15 |
Correct |
114 ms |
235404 KB |
Output is correct |
16 |
Correct |
146 ms |
235380 KB |
Output is correct |
17 |
Correct |
112 ms |
236312 KB |
Output is correct |
18 |
Correct |
109 ms |
235476 KB |
Output is correct |
19 |
Correct |
108 ms |
235412 KB |
Output is correct |
20 |
Runtime error |
150 ms |
262144 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
109 ms |
235036 KB |
Output is correct |
2 |
Correct |
107 ms |
235148 KB |
Output is correct |
3 |
Correct |
126 ms |
235040 KB |
Output is correct |
4 |
Correct |
119 ms |
235056 KB |
Output is correct |
5 |
Correct |
112 ms |
235036 KB |
Output is correct |
6 |
Correct |
109 ms |
235116 KB |
Output is correct |
7 |
Correct |
112 ms |
235156 KB |
Output is correct |
8 |
Correct |
110 ms |
235148 KB |
Output is correct |
9 |
Correct |
111 ms |
235164 KB |
Output is correct |
10 |
Correct |
111 ms |
235148 KB |
Output is correct |
11 |
Correct |
111 ms |
235652 KB |
Output is correct |
12 |
Correct |
159 ms |
245152 KB |
Output is correct |
13 |
Correct |
157 ms |
245236 KB |
Output is correct |
14 |
Correct |
115 ms |
235368 KB |
Output is correct |
15 |
Correct |
108 ms |
235420 KB |
Output is correct |
16 |
Correct |
112 ms |
235340 KB |
Output is correct |
17 |
Correct |
116 ms |
236260 KB |
Output is correct |
18 |
Correct |
109 ms |
235460 KB |
Output is correct |
19 |
Correct |
108 ms |
235296 KB |
Output is correct |
20 |
Runtime error |
147 ms |
262144 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
111 ms |
235084 KB |
Output is correct |
2 |
Correct |
113 ms |
235164 KB |
Output is correct |
3 |
Correct |
108 ms |
235124 KB |
Output is correct |
4 |
Correct |
109 ms |
235088 KB |
Output is correct |
5 |
Correct |
108 ms |
235120 KB |
Output is correct |
6 |
Correct |
120 ms |
235132 KB |
Output is correct |
7 |
Correct |
108 ms |
235084 KB |
Output is correct |
8 |
Correct |
109 ms |
235084 KB |
Output is correct |
9 |
Correct |
109 ms |
235100 KB |
Output is correct |
10 |
Correct |
109 ms |
235172 KB |
Output is correct |
11 |
Correct |
110 ms |
235668 KB |
Output is correct |
12 |
Correct |
144 ms |
245180 KB |
Output is correct |
13 |
Correct |
147 ms |
245452 KB |
Output is correct |
14 |
Correct |
110 ms |
235360 KB |
Output is correct |
15 |
Correct |
108 ms |
235344 KB |
Output is correct |
16 |
Correct |
111 ms |
235384 KB |
Output is correct |
17 |
Correct |
121 ms |
236224 KB |
Output is correct |
18 |
Correct |
109 ms |
235420 KB |
Output is correct |
19 |
Correct |
119 ms |
235364 KB |
Output is correct |
20 |
Runtime error |
149 ms |
262144 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |