Submission #339429

#	Time	Username	Problem	Language	Result	Execution time	Memory
339429		beksultan04	Special graph (IZhO13_specialg)	C++14	0 / 100	1077 ms	1824 KiB

specialg

#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;
int q[N];
bool vis[N];
main(){
    int n,i,j,m;
    cin>>n;
    for (i=1;i<=n;++i){
        cin>>q[i];
    }
    cin>>m;
    while (m--){
        int t;
        cin>>t;
        if (t==1){
            int x;
            cin>>x;
            q[x] = 0;
        }
        else {
            int x,y;
            cin>>x>>y;
            int ans=0;
            priority_queue <int> t;
            while (q[x] != 0 && x != y){
                if (vis[x])break;
                vis[x]=1;
                t.push(x);
                x = q[x];
                ans ++;
            }
            while (!t.empty()){
                vis[t.top()]=0;
                t.pop();
            }
            if (x != y )ans =-1;
            cout <<ans<<'\n';
        }
    }



}

Compilation message (stderr)

specialg.cpp:23:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   23 | main(){
      |      ^
specialg.cpp: In function 'int main()':
specialg.cpp:24:13: warning: unused variable 'j' [-Wunused-variable]
   24 |     int n,i,j,m;
      |             ^

• Subtask 1: 0 / 100