| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 416753 |
2021-06-02T21:47:42 Z |
peuch |
Sky Walking (IOI19_walk) |
C++17 |
|
25 ms |
7124 KB |
#include "walk.h"
#include<bits/stdc++.h>
using namespace std;
const long long MAXN = 1e5 + 10;
const long long INF = 1e18;
map<pair<long long, long long>, long long> node;
vector<long long> dist;
vector<bool> marc;
vector<vector<long long> > ar, wg;
long long cnt = -1;
struct event{
long long l, r, h;
event(long long _l = 0, long long _r = 0, long long _h = 0){
l = _l, r = _r, h = _h;
}
bool operator < (event x) const {
if(h == x.h) return r - l < x.r - x.l;
return h > x.h;
}
};
vector<event> line;
vector<long long> last;
void dijkstra(long long ini);
int create(int x, int y){
if(node[make_pair(x, y)] != 0) return node[make_pair(x, y)];
node[make_pair(x, y)] = ++cnt;
ar.push_back(vector<long long>(0));
wg.push_back(vector<long long>(0));
dist.push_back(INF);
marc.push_back(0);
if(last[x] != 0) {
ar[node[make_pair(x, y)]].push_back(node[make_pair(x, last[x])]);
ar[node[make_pair(x, last[x])]].push_back(node[make_pair(x, y)]);
wg[node[make_pair(x, y)]].push_back(abs(y - last[x]));
wg[node[make_pair(x, last[x])]].push_back(abs(y - last[x]));
}
last[x] = y;
}
long long min_distance(std::vector<int> X, std::vector<int> H, std::vector<int> L, std::vector<int> R, std::vector<int> Y, int S, int G) {
for(long long i = 0; i < X.size(); i++)
line.push_back(event(i, i, H[i]));
for(long long i = 0; i < L.size(); i++)
line.push_back(event(L[i], R[i], Y[i]));
sort(line.begin(), line.end());
last = vector<long long> (X.size(), 0);
set<long long> torres;
for(long long i = 0; i < line.size(); i++){
long long l = line[i].l, r = line[i].r, y = line[i].h;
if(l == r) torres.insert(l);
else{
set<long long> :: iterator it = torres.upper_bound(l);
create(l, y);
long long ult = l;
while(it != torres.end() && *it <= r){
create(*it, y);
ar[node[make_pair(*it, y)]].push_back(node[make_pair(ult, y)]);
ar[node[make_pair(ult, y)]].push_back(node[make_pair(*it, y)]);
wg[node[make_pair(*it, y)]].push_back(abs(X[*it] - X[ult]));
wg[node[make_pair(ult, y)]].push_back(abs(X[*it] - X[ult]));
ult = *it;
it++;
}
}
}
for(long long i = 0; i < X.size(); i++)
create(i, 0);
dijkstra(create(S, 0));
if(dist[create(G, 0)] >= INF) dist[create(G, 0)] = -1;
return dist[create(G, 0)];
}
void dijkstra(long long ini){
dist[ini] = 0;
set<pair<long long, long long> > s;
for(long long i = 0; i <= cnt; i++)
s.insert(make_pair(dist[i], i));
while(!s.empty()){
long long cur = s.begin()->second;
if(dist[cur] >= INF) break;
marc[cur] = 1;
s.erase(s.begin());
for(long long i = 0; i < ar[cur].size(); i++){
long long viz = ar[cur][i];
if(marc[viz]) continue;
s.erase(make_pair(dist[viz], viz));
dist[viz] = min(dist[viz], dist[cur] + wg[cur][i]);
s.insert(make_pair(dist[viz], viz));
}
}
}
Compilation message
walk.cpp: In function 'long long int min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:48:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
48 | for(long long i = 0; i < X.size(); i++)
| ~~^~~~~~~~~~
walk.cpp:51:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
51 | for(long long i = 0; i < L.size(); i++)
| ~~^~~~~~~~~~
walk.cpp:58:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<event>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
58 | for(long long i = 0; i < line.size(); i++){
| ~~^~~~~~~~~~~~~
walk.cpp:76:25: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
76 | for(long long i = 0; i < X.size(); i++)
| ~~^~~~~~~~~~
walk.cpp: In function 'void dijkstra(long long int)':
walk.cpp:93:26: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
93 | for(long long i = 0; i < ar[cur].size(); i++){
| ~~^~~~~~~~~~~~~~~~
walk.cpp: In function 'int create(int, int)':
walk.cpp:43:10: warning: control reaches end of non-void function [-Wreturn-type]
43 | last[x] = y;
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
460 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
3 ms |
460 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
25 ms |
7124 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
25 ms |
7124 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
2 ms |
460 KB |
Execution killed with signal 11 |
| 2 |
Halted |
0 ms |
0 KB |
- |
