#include<bits/stdc++.h>
using namespace std;
#define ll long long
const int ar = 3e4 + 5;
const int N = 105;
int n, m;
int vt[ar], p[ar];
int dp[ar][N];
vector<int> adj[ar];
struct tuan {
int cost, u, step;
};
bool operator > (tuan a, tuan b) {
return a.cost > b.cost;
}
void dijktra() {
for(int i = 0; i < m; ++i) {
adj[vt[i]].push_back(i);
}
priority_queue<tuan, vector<tuan>, greater<tuan>> q;
memset(dp, 0x3f, sizeof(dp));
dp[vt[0]][0] = 0;
q.push({0, vt[0], 0});
int ans = 1e9;
while(q.size()) {
tuan top = q.top(); q.pop();
int u = top.u, cost = top.cost, step = top.step;
if(cost > dp[u][step]) continue;
if(step == 0) {
for(int v : adj[u]) {
if(p[v] >= N) {
int bonus = 0;
for(int i = u; i < n; i += p[v]) {
if(dp[i][0] > cost + bonus) {
dp[i][0] = cost + bonus;
q.push({dp[i][0], i, 0});
}
++bonus;
}
bonus = 0;
for(int i = u; i >= 0; i -= p[v]) {
if(dp[i][0] > cost + bonus) {
dp[i][0] = cost + bonus;
q.push({dp[i][0], i, 0});
}
++bonus;
}
}
else {
if(dp[u][p[v]] > cost) {
dp[u][p[v]] = cost;
q.push({dp[u][p[v]], u, p[v]});
}
}
}
}
else {
if(u - step >= 0 && dp[u - step][step] > cost + 1) {
dp[u - step][step] = cost + 1;
q.push({dp[u - step][step], u - step, step});
}
if(u + step < n && dp[u + step][step] > cost + 1) {
dp[u + step][step] = cost + 1;
q.push({dp[u + step][step], u + step, step});
}
if(dp[u][0] > cost) {
dp[u][0] = cost;
q.push({dp[u][0], u, 0});
}
}
}
}
int main() {
ios::sync_with_stdio(0);
cin.tie(0); cout.tie(0);
cin >> n >> m;
for(int i = 0; i < m; ++i) {
cin >> vt[i] >> p[i];
}
dijktra();
int ans = 1e9;
for(int i = 0; i < N; ++i) {
ans = min(ans, dp[vt[1]][i]);
}
if(ans == 1e9) ans = -1;
cout << ans;
}
Compilation message
skyscraper.cpp: In function 'void dijktra()':
skyscraper.cpp:27:9: warning: unused variable 'ans' [-Wunused-variable]
27 | int ans = 1e9;
| ^~~
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 2 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 3 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 4 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 5 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 6 |
Correct |
4 ms |
13460 KB |
Output is correct |
| 7 |
Correct |
2 ms |
13404 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 2 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 3 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 4 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 5 |
Correct |
2 ms |
13400 KB |
Output is correct |
| 6 |
Correct |
2 ms |
13656 KB |
Output is correct |
| 7 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 8 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 9 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 10 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 11 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 12 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 13 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 14 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 15 |
Correct |
3 ms |
13404 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 2 |
Correct |
3 ms |
13448 KB |
Output is correct |
| 3 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 4 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 5 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 6 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 7 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 8 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 9 |
Correct |
4 ms |
13404 KB |
Output is correct |
| 10 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 11 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 12 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 13 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 14 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 15 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 16 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 17 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 18 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 19 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 20 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 21 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 22 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 23 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 24 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 25 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 26 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 27 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 28 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 29 |
Correct |
5 ms |
13400 KB |
Output is correct |
| 30 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 31 |
Correct |
4 ms |
13404 KB |
Output is correct |
| 32 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 33 |
Correct |
9 ms |
13576 KB |
Output is correct |
| 34 |
Correct |
9 ms |
13400 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 2 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 3 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 4 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 5 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 6 |
Correct |
2 ms |
13400 KB |
Output is correct |
| 7 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 8 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 9 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 10 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 11 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 12 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 13 |
Correct |
2 ms |
13400 KB |
Output is correct |
| 14 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 15 |
Correct |
3 ms |
13496 KB |
Output is correct |
| 16 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 17 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 18 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 19 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 20 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 21 |
Correct |
2 ms |
13488 KB |
Output is correct |
| 22 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 23 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 24 |
Correct |
3 ms |
13400 KB |
Output is correct |
| 25 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 26 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 27 |
Correct |
2 ms |
13500 KB |
Output is correct |
| 28 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 29 |
Correct |
5 ms |
13400 KB |
Output is correct |
| 30 |
Correct |
4 ms |
13660 KB |
Output is correct |
| 31 |
Correct |
4 ms |
13404 KB |
Output is correct |
| 32 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 33 |
Correct |
9 ms |
13580 KB |
Output is correct |
| 34 |
Correct |
9 ms |
13572 KB |
Output is correct |
| 35 |
Correct |
9 ms |
13916 KB |
Output is correct |
| 36 |
Correct |
4 ms |
13404 KB |
Output is correct |
| 37 |
Correct |
11 ms |
14004 KB |
Output is correct |
| 38 |
Correct |
14 ms |
14104 KB |
Output is correct |
| 39 |
Correct |
12 ms |
13916 KB |
Output is correct |
| 40 |
Correct |
11 ms |
13916 KB |
Output is correct |
| 41 |
Correct |
12 ms |
14056 KB |
Output is correct |
| 42 |
Correct |
6 ms |
13916 KB |
Output is correct |
| 43 |
Correct |
5 ms |
13916 KB |
Output is correct |
| 44 |
Correct |
5 ms |
13912 KB |
Output is correct |
| 45 |
Correct |
19 ms |
14172 KB |
Output is correct |
| 46 |
Correct |
18 ms |
14168 KB |
Output is correct |
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Correct |
2 ms |
13400 KB |
Output is correct |
| 2 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 3 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 4 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 5 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 6 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 7 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 8 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 9 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 10 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 11 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 12 |
Correct |
2 ms |
13352 KB |
Output is correct |
| 13 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 14 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 15 |
Correct |
3 ms |
13400 KB |
Output is correct |
| 16 |
Correct |
2 ms |
13400 KB |
Output is correct |
| 17 |
Correct |
3 ms |
13496 KB |
Output is correct |
| 18 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 19 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 20 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 21 |
Correct |
2 ms |
13652 KB |
Output is correct |
| 22 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 23 |
Correct |
2 ms |
13404 KB |
Output is correct |
| 24 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 25 |
Correct |
3 ms |
13400 KB |
Output is correct |
| 26 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 27 |
Correct |
3 ms |
13504 KB |
Output is correct |
| 28 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 29 |
Correct |
5 ms |
13464 KB |
Output is correct |
| 30 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 31 |
Correct |
4 ms |
13404 KB |
Output is correct |
| 32 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 33 |
Correct |
9 ms |
13584 KB |
Output is correct |
| 34 |
Correct |
9 ms |
13404 KB |
Output is correct |
| 35 |
Correct |
9 ms |
13996 KB |
Output is correct |
| 36 |
Correct |
5 ms |
13404 KB |
Output is correct |
| 37 |
Correct |
11 ms |
14000 KB |
Output is correct |
| 38 |
Correct |
12 ms |
13916 KB |
Output is correct |
| 39 |
Correct |
12 ms |
13912 KB |
Output is correct |
| 40 |
Correct |
12 ms |
13912 KB |
Output is correct |
| 41 |
Correct |
13 ms |
13916 KB |
Output is correct |
| 42 |
Correct |
6 ms |
13916 KB |
Output is correct |
| 43 |
Correct |
5 ms |
13916 KB |
Output is correct |
| 44 |
Correct |
5 ms |
13912 KB |
Output is correct |
| 45 |
Correct |
19 ms |
14168 KB |
Output is correct |
| 46 |
Correct |
19 ms |
14172 KB |
Output is correct |
| 47 |
Correct |
34 ms |
14424 KB |
Output is correct |
| 48 |
Correct |
6 ms |
13916 KB |
Output is correct |
| 49 |
Correct |
6 ms |
13916 KB |
Output is correct |
| 50 |
Correct |
5 ms |
13916 KB |
Output is correct |
| 51 |
Correct |
23 ms |
14716 KB |
Output is correct |
| 52 |
Correct |
26 ms |
14676 KB |
Output is correct |
| 53 |
Correct |
10 ms |
14172 KB |
Output is correct |
| 54 |
Correct |
3 ms |
13404 KB |
Output is correct |
| 55 |
Correct |
3 ms |
13400 KB |
Output is correct |
| 56 |
Correct |
9 ms |
14428 KB |
Output is correct |
| 57 |
Correct |
33 ms |
13596 KB |
Output is correct |
| 58 |
Correct |
6 ms |
13916 KB |
Output is correct |
| 59 |
Correct |
8 ms |
13916 KB |
Output is correct |
| 60 |
Correct |
9 ms |
13916 KB |
Output is correct |
| 61 |
Correct |
8 ms |
13916 KB |
Output is correct |
| 62 |
Correct |
17 ms |
14660 KB |
Output is correct |
| 63 |
Correct |
21 ms |
15576 KB |
Output is correct |
| 64 |
Correct |
21 ms |
15576 KB |
Output is correct |
| 65 |
Correct |
34 ms |
15576 KB |
Output is correct |
| 66 |
Correct |
247 ms |
15568 KB |
Output is correct |
| 67 |
Correct |
234 ms |
15572 KB |
Output is correct |
