#include "bits/stdc++.h"
using namespace std;
const int MAXN = 3e4+5;
vector<set< pair<int, int> > > adj(MAXN);
vector< set < int > > doges(MAXN);
int dp[MAXN];
map< pair<int, int>, bool > done;
map< pair<int, int>, int> max_road;
bool visited[MAXN];
int main()
{
ios_base::sync_with_stdio(0);
cin.tie(0);
int n, m;
cin >> n >> m;
int goal, begin;
for(int i = 0; i < m; i++)
{
pair<int, int> temp;
cin >> temp.first >> temp.second;
if(i == 1)
goal = temp.first;
else if(i == 0)
begin = temp.first;
doges[temp.first].insert(temp.second);
int curr = temp.first + temp.second;
int cnt = 1;
while(curr < n)
{
int val = max_road[{temp.first, curr}];
if(val == 0 || val > cnt)
{
adj[temp.first].erase({val, curr});
max_road[{temp.first, curr}] = cnt;
adj[temp.first].insert({cnt, curr});
}
//if(curr == 4)
//cout << temp.first << "\n";
cnt++;
curr += temp.second;
}
curr = temp.first - temp.second;
cnt = 1;
while(curr >= 0)
{
int val = max_road[{temp.first, curr}];
if(val == 0 || val > cnt)
{
adj[temp.first].erase({val, curr});
max_road[{temp.first, curr}] = cnt;
adj[temp.first].insert({cnt, curr});
}
//if(curr == 1)
//cout << temp.first << "\n";
cnt++;
curr -= temp.second;
}
}
for(int i = 0; i <= n; i++) {
dp[i] = 1e9;
visited[i] = false;
}
visited[begin] = false;
dp[begin] = 0;
set< pair<int, int> > curr;
curr.insert({0, begin});
int ans = 1e9;
while(!curr.empty())
{
pair<int, int> temp = *(curr.begin());
int v = temp.second;
int len = temp.first;
//cout << v << "\n";
curr.erase(curr.begin());
// if(v == goal)
// ans = min(ans, )
for(pair<int, int> e : adj[v])
{
//cout << v << " " << e.second << "\n";
if(dp[e.second] > len + e.first)
{
curr.erase({dp[e.second], e.second});
dp[e.second] = len + e.first;
curr.insert({dp[e.second], e.second});
}
}
//adj[v].clear();
//cout << v << "\n";
//dp[v] = 1e9;
}
ans = dp[goal];
if(ans >= 1e9)
ans = -1;
cout << ans << "\n";
}
Compilation message
skyscraper.cpp: In function 'int main()':
skyscraper.cpp:99:9: warning: 'goal' may be used uninitialized in this function [-Wmaybe-uninitialized]
99 | ans = dp[goal];
| ~~~~^~~~~~~~~~
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
3156 KB |
Output is correct |
2 |
Correct |
2 ms |
3156 KB |
Output is correct |
3 |
Correct |
2 ms |
3028 KB |
Output is correct |
4 |
Correct |
2 ms |
3156 KB |
Output is correct |
5 |
Correct |
2 ms |
3156 KB |
Output is correct |
6 |
Correct |
2 ms |
3156 KB |
Output is correct |
7 |
Correct |
2 ms |
3156 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
3156 KB |
Output is correct |
2 |
Correct |
2 ms |
3156 KB |
Output is correct |
3 |
Correct |
2 ms |
3156 KB |
Output is correct |
4 |
Correct |
2 ms |
3156 KB |
Output is correct |
5 |
Correct |
3 ms |
3156 KB |
Output is correct |
6 |
Correct |
2 ms |
3156 KB |
Output is correct |
7 |
Correct |
2 ms |
3156 KB |
Output is correct |
8 |
Correct |
2 ms |
3156 KB |
Output is correct |
9 |
Correct |
2 ms |
3156 KB |
Output is correct |
10 |
Correct |
2 ms |
3284 KB |
Output is correct |
11 |
Correct |
5 ms |
3796 KB |
Output is correct |
12 |
Correct |
5 ms |
3156 KB |
Output is correct |
13 |
Correct |
10 ms |
4196 KB |
Output is correct |
14 |
Correct |
4 ms |
3424 KB |
Output is correct |
15 |
Correct |
4 ms |
3412 KB |
Output is correct |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
3156 KB |
Output is correct |
2 |
Correct |
2 ms |
3164 KB |
Output is correct |
3 |
Correct |
2 ms |
3028 KB |
Output is correct |
4 |
Correct |
2 ms |
3156 KB |
Output is correct |
5 |
Correct |
2 ms |
3156 KB |
Output is correct |
6 |
Correct |
2 ms |
3156 KB |
Output is correct |
7 |
Correct |
2 ms |
3164 KB |
Output is correct |
8 |
Correct |
2 ms |
3156 KB |
Output is correct |
9 |
Correct |
2 ms |
3152 KB |
Output is correct |
10 |
Correct |
3 ms |
3284 KB |
Output is correct |
11 |
Correct |
5 ms |
3796 KB |
Output is correct |
12 |
Correct |
5 ms |
3168 KB |
Output is correct |
13 |
Correct |
10 ms |
4180 KB |
Output is correct |
14 |
Correct |
4 ms |
3412 KB |
Output is correct |
15 |
Correct |
4 ms |
3412 KB |
Output is correct |
16 |
Correct |
4 ms |
3668 KB |
Output is correct |
17 |
Correct |
11 ms |
5476 KB |
Output is correct |
18 |
Correct |
4 ms |
3796 KB |
Output is correct |
19 |
Correct |
3 ms |
3552 KB |
Output is correct |
20 |
Runtime error |
821 ms |
262144 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
3156 KB |
Output is correct |
2 |
Correct |
3 ms |
3156 KB |
Output is correct |
3 |
Correct |
2 ms |
3156 KB |
Output is correct |
4 |
Correct |
2 ms |
3156 KB |
Output is correct |
5 |
Correct |
2 ms |
3028 KB |
Output is correct |
6 |
Correct |
3 ms |
3156 KB |
Output is correct |
7 |
Correct |
2 ms |
3164 KB |
Output is correct |
8 |
Correct |
2 ms |
3156 KB |
Output is correct |
9 |
Correct |
2 ms |
3156 KB |
Output is correct |
10 |
Correct |
2 ms |
3296 KB |
Output is correct |
11 |
Correct |
5 ms |
3796 KB |
Output is correct |
12 |
Correct |
5 ms |
3156 KB |
Output is correct |
13 |
Correct |
9 ms |
4196 KB |
Output is correct |
14 |
Correct |
4 ms |
3412 KB |
Output is correct |
15 |
Correct |
4 ms |
3412 KB |
Output is correct |
16 |
Correct |
4 ms |
3668 KB |
Output is correct |
17 |
Correct |
13 ms |
5472 KB |
Output is correct |
18 |
Correct |
4 ms |
3796 KB |
Output is correct |
19 |
Correct |
4 ms |
3544 KB |
Output is correct |
20 |
Runtime error |
784 ms |
262144 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
2 ms |
3156 KB |
Output is correct |
2 |
Correct |
2 ms |
3156 KB |
Output is correct |
3 |
Correct |
3 ms |
3156 KB |
Output is correct |
4 |
Correct |
2 ms |
3028 KB |
Output is correct |
5 |
Correct |
2 ms |
3028 KB |
Output is correct |
6 |
Correct |
2 ms |
3156 KB |
Output is correct |
7 |
Correct |
2 ms |
3156 KB |
Output is correct |
8 |
Correct |
2 ms |
3156 KB |
Output is correct |
9 |
Correct |
2 ms |
3156 KB |
Output is correct |
10 |
Correct |
3 ms |
3412 KB |
Output is correct |
11 |
Correct |
5 ms |
3796 KB |
Output is correct |
12 |
Correct |
5 ms |
3204 KB |
Output is correct |
13 |
Correct |
10 ms |
4172 KB |
Output is correct |
14 |
Correct |
4 ms |
3424 KB |
Output is correct |
15 |
Correct |
4 ms |
3416 KB |
Output is correct |
16 |
Correct |
4 ms |
3676 KB |
Output is correct |
17 |
Correct |
10 ms |
5472 KB |
Output is correct |
18 |
Correct |
4 ms |
3796 KB |
Output is correct |
19 |
Correct |
4 ms |
3548 KB |
Output is correct |
20 |
Runtime error |
790 ms |
262144 KB |
Execution killed with signal 9 |
21 |
Halted |
0 ms |
0 KB |
- |