| # |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
| 761984 |
2023-06-20T13:39:21 Z |
aihay |
Sky Walking (IOI19_walk) |
C++14 |
|
4000 ms |
527592 KB |
#include <bits/stdc++.h>
using namespace std;
typedef long long LL;
#define F first
#define S second
#define PB push_back
#define FR(i,a,b) for(int i=(a);i<(b);i++)
#define FOR(i,n) FR(i,0,n)
#define SZ(x) int(x.size())
const LL MAAX=1e18;
const int MOD=1e9+7;
const int MAX=1e9;
LL n,m,s,g,x[100010],h[100010],l[100010],r[100010],y[100010],idxx;
pair<LL,LL> srtb[100010];
pair<LL,pair<LL,LL>> srts[100010];
LL cst[1000010];
vector<LL> v[5000010];
map<pair<LL,LL>,LL> mp;
map<LL,LL> comp;
LL dcomp[100010];
pair<LL,LL> inter[5000010];
LL dijk(){
for(int i=0;i<idxx;i++)
cst[i]=MAAX;
priority_queue<pair<LL,LL>> pq;
pq.push({0,mp[{x[s],0}]});
while(pq.size()){
LL cost=-pq.top().F,idx=pq.top().S;
pq.pop();
if(cost>cst[idx])
continue;
cst[idx]=cost;
if(idx==mp[{x[g],0}])
break;
for(int i=0;i<v[idx].size();i++){
LL x1=inter[idx].F,x2=inter[v[idx][i]].F;
LL y1=inter[idx].S,y2=inter[v[idx][i]].S;
LL ncst=cost+abs(x2-x1)+abs(y2-y1);
LL nidx=v[idx][i];
if(ncst<cst[nidx]){
cst[nidx]=ncst;
pq.push({-ncst,nidx});
}
}
}
if(cst[mp[{x[g],0}]]==MAAX)
cst[mp[{x[g],0}]]=-1;
return cst[mp[{x[g],0}]];
}
map<int,vector<int>> vec;
LL min_distance(vector<int> X,vector<int> H,vector<int> L,vector<int> R,vector<int> Y,int S,int G){
n=X.size();
m=L.size();
s=S,g=G;
for(int i=0;i<n;i++){
x[i]=X[i];
comp[x[i]]=i;
h[i]=H[i];
vec[x[i]].PB(0);
srtb[i]={h[i],x[i]};
}
sort(srtb,srtb+n);
mp[{x[s],0}]=idxx++;
inter[0]={x[s],0};
mp[{x[g],0}]=idxx++;
inter[1]={x[g],0};
for(int i=0;i<n;i++){
if(mp[{x[i],0}]==0){
mp[{x[i],0}]=idxx++;
inter[idxx-1]={x[i],0};
}
}
for(int i=0;i<m;i++){
l[i]=L[i];
r[i]=R[i];
y[i]=Y[i];
srts[i]={y[i],{x[l[i]],x[r[i]]}};
}
sort(srts,srts+m);
set<int> curst;
int idx=0;
for(int i=0;i<m;i++){
while(idx<n&&srtb[idx].F>=srts[i].F)
curst.insert(srtb[idx++].S);
int lst=-1;
for(set<int>::iterator j=curst.lower_bound(srts[i].S.F);j!=curst.end()&&(*j)<=srts[i].S.S;j++){
if(mp[{(*j),srts[i].F}]==0){
mp[{(*j),srts[i].F}]=idxx++;
inter[idxx-1]={(*j),srts[i].F};
}
if(~lst){
v[mp[{lst,srts[i].F}]].PB(mp[{(*j),srts[i].F}]);
v[mp[{(*j),srts[i].F}]].PB(mp[{lst,srts[i].F}]);
}
vec[(*j)].PB(srts[i].F);
lst=(*j);
}
}
for(int i=0;i<n;i++){
sort(vec[x[i]].begin(),vec[x[i]].end());
for(int j=1;j<vec[x[i]].size();j++){
v[mp[{x[i],vec[x[i]][j]}]].PB(mp[{x[i],vec[x[i]][j-1]}]);
v[mp[{x[i],vec[x[i]][j-1]}]].PB(mp[{x[i],vec[x[i]][j]}]);
}
}
return dijk();
}
Compilation message
walk.cpp: In function 'LL dijk()':
walk.cpp:36:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
36 | for(int i=0;i<v[idx].size();i++){
| ~^~~~~~~~~~~~~~
walk.cpp: In function 'LL min_distance(std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, std::vector<int>, int, int)':
walk.cpp:102:16: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
102 | for(int j=1;j<vec[x[i]].size();j++){
| ~^~~~~~~~~~~~~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
64 ms |
117704 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
55 ms |
117712 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
213 ms |
136380 KB |
Output is correct |
| 2 |
Execution timed out |
4051 ms |
527592 KB |
Time limit exceeded |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Correct |
213 ms |
136380 KB |
Output is correct |
| 2 |
Execution timed out |
4051 ms |
527592 KB |
Time limit exceeded |
| 3 |
Halted |
0 ms |
0 KB |
- |
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Incorrect |
64 ms |
117704 KB |
Output isn't correct |
| 2 |
Halted |
0 ms |
0 KB |
- |
