Submission #339753

#	Time	Username	Problem	Language	Result	Execution time	Memory
339753		beksultan04	Crazy old lady (IZhO13_crazy)	C++14	0 / 100	1 ms	364 KiB

crazy

#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("");
const int N = 1e5+12,INF=1e9+7;
int q[N];
main(){
    int t;
    scan1(t)
    while (t--){
        int n,i,j,s=0;
        scan1(n)
        map<pii,bool> mp;
        bool f=1;
        for (i=1;i<=n;++i){
            int x,y=i;
            scan1(x)
            q[x]=i;
            if (i == 1)s = x;
            if (mp[{x,y}])f=0;
            mp[{x,y}]=1;
            mp[{y,x}]=1;
        }
        if (f)cout <<q[s]<<"\n";
        else cout <<"0\n";
    }
}

Compilation message (stderr)

crazy.cpp:21:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   21 | main(){
      |      ^
crazy.cpp: In function 'int main()':
crazy.cpp:25:17: warning: unused variable 'j' [-Wunused-variable]
   25 |         int n,i,j,s=0;
      |                 ^
crazy.cpp:11:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 | #define scan1(a) scanf("%lld",&a);
      |                  ~~~~~^~~~~~~~~~~
crazy.cpp:23:5: note: in expansion of macro 'scan1'
   23 |     scan1(t)
      |     ^~~~~
crazy.cpp:11:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 | #define scan1(a) scanf("%lld",&a);
      |                  ~~~~~^~~~~~~~~~~
crazy.cpp:26:9: note: in expansion of macro 'scan1'
   26 |         scan1(n)
      |         ^~~~~
crazy.cpp:11:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   11 | #define scan1(a) scanf("%lld",&a);
      |                  ~~~~~^~~~~~~~~~~
crazy.cpp:31:13: note: in expansion of macro 'scan1'
   31 |             scan1(x)
      |             ^~~~~

• Subtask 1: 0 / 100