# |
Submission time |
Handle |
Problem |
Language |
Result |
Execution time |
Memory |
751270 |
2023-05-31T10:25:14 Z |
irmuun |
Portals (BOI14_portals) |
C++17 |
|
1 ms |
444 KB |
#include<bits/stdc++.h>
using namespace std;
#define pb push_back
#define ll long long
#define ff first
#define ss second
#define all(s) s.begin(),s.end()
int main(){
ios_base::sync_with_stdio(false); cin.tie(0); cout.tie(0);
int r,c;
cin>>r>>c;
string s[r];
vector<pair<int,int>>adj[r][c];
int sx,sy,cx,cy;
for(int i=0;i<r;i++){
cin>>s[i];
vector<int>v;
v.pb(-1);
for(int j=0;j<c;j++){
if(s[i][j]=='S'){
sx=i;
sy=j;
}
if(s[i][j]=='C'){
cx=i;
cy=j;
}
if(s[i][j]=='#'){
v.pb(j);
}
}
v.pb(r);
for(int j=0;j<v.size()-1;j++){
if(v[j]+1!=v[j+1]){
adj[i][v[j]+1].pb({i,v[j+1]-1});
adj[i][v[j+1]-1].pb({i,v[j]+1});
}
}
}
for(int j=0;j<c;j++){
vector<int>v;
v.pb(-1);
for(int i=0;i<r;i++){
if(s[i][j]=='#'){
v.pb(i);
}
}
v.pb(r);
for(int i=0;i<v.size()-1;i++){
if(v[i]+1!=v[i+1]){
adj[v[i]+1][j].pb({v[i+1]-1,j});
adj[v[i+1]-1][j].pb({v[i]+1,j});
}
}
}
vector<int>dx={1,-1,0,0};
vector<int>dy={0,0,1,-1};
for(int i=0;i<r;i++){
for(int j=0;j<c;j++){
for(int k=0;k<4;k++){
int x=i+dx[k],y=j+dy[k];
if(x<0||x>=r||y<0||y>=c||s[x][y]=='#') continue;
adj[i][j].pb({x,y});
}
}
}
int dist[r][c];
memset(dist,-1,sizeof(dist));
queue<pair<int,int>>q;
q.push({sx,sy});
dist[sx][sy]=0;
while(!q.empty()){
int x=q.front().ff,y=q.front().ss;
q.pop();
for(auto [i,j]:adj[x][y]){
if(dist[i][j]==-1){
dist[i][j]=dist[x][y]+1;
q.push({i,j});
}
}
}
cout<<dist[cx][cy];
}
Compilation message
portals.cpp: In function 'int main()':
portals.cpp:36:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
36 | for(int j=0;j<v.size()-1;j++){
| ~^~~~~~~~~~~
portals.cpp:52:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
52 | for(int i=0;i<v.size()-1;i++){
| ~^~~~~~~~~~~
portals.cpp:74:17: warning: 'sy' may be used uninitialized in this function [-Wmaybe-uninitialized]
74 | dist[sx][sy]=0;
| ~~~~~~~~~~~~^~
portals.cpp:74:17: warning: 'sx' may be used uninitialized in this function [-Wmaybe-uninitialized]
portals.cpp:85:22: warning: 'cy' may be used uninitialized in this function [-Wmaybe-uninitialized]
85 | cout<<dist[cx][cy];
| ^
portals.cpp:85:22: warning: 'cx' may be used uninitialized in this function [-Wmaybe-uninitialized]
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Runtime error |
1 ms |
340 KB |
Execution killed with signal 11 |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Runtime error |
1 ms |
340 KB |
Execution killed with signal 11 |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
212 KB |
Output is correct |
2 |
Runtime error |
1 ms |
340 KB |
Execution killed with signal 11 |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
0 ms |
340 KB |
Output is correct |
2 |
Runtime error |
1 ms |
340 KB |
Execution killed with signal 11 |
3 |
Halted |
0 ms |
0 KB |
- |
# |
Verdict |
Execution time |
Memory |
Grader output |
1 |
Correct |
1 ms |
212 KB |
Output is correct |
2 |
Runtime error |
1 ms |
444 KB |
Execution killed with signal 11 |
3 |
Halted |
0 ms |
0 KB |
- |