#include <bits/stdc++.h>
using namespace std;
//#define int long long
#define pii pair<int,int>
#define OK puts("OK");
#define NO puts("NO");
#define YES puts("YES");
#define fr first
#define sc second
#define ret return
#define scan1(a) scanf("%lld",&a);
#define scan2(a,b) scanf("%lld %lld",&a, &b);
#define scan3(a,b,c) scanf("%lld %lld %lld",&a,&b,&c);
#define all(s) s.begin(),s.end()
#define allr(s) s.rbegin(),s.rend()
#define pb push_back
#define sz(v) (int)v.size()
#define endi puts("");
#define eps 1e-15
const int N = 1e5+12,INF=1e9+7;
vector <int> g[N];
int ans;
bool vis[N];
void dfs(int x,int y,int cnt=0){
vis[x]=1;
if (x == y){
ans = cnt;
ret ;
}
if (ans > 0 )ret ;
for (int i=0;i<g[x].size();++i){
dfs(g[x][i],y,cnt+1);
}
vis[x]=0;
}
main(){
int n,i,j,m;
cin>>n;
for (i=1;i<=n;++i){
int x;
cin>>x;
if (x)g[i].pb(x);
}
cin>>m;
while (m--){
int t;
cin>>t;
if (t==1){
int x;
cin>>x;
g[x].pop_back();
}
else {
int x,y;
cin>>x>>y;
ans=-1;
dfs(x,y);
cout <<ans<<'\n';
}
}
}
Compilation message
specialg.cpp: In function 'void dfs(int, int, int)':
specialg.cpp:31:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
31 | for (int i=0;i<g[x].size();++i){
| ~^~~~~~~~~~~~
specialg.cpp: At global scope:
specialg.cpp:39:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
39 | main(){
| ^
specialg.cpp: In function 'int main()':
specialg.cpp:40:13: warning: unused variable 'j' [-Wunused-variable]
40 | int n,i,j,m;
| ^
| # |
결과 |
실행 시간 |
메모리 |
Grader output |
| 1 |
Runtime error |
59 ms |
65540 KB |
Execution killed with signal 9 (could be triggered by violating memory limits) |
| 2 |
Halted |
0 ms |
0 KB |
- |
