oj.uz

Submission #849396

# Submission time Handle Problem Language Result Execution time Memory
849396 2023-09-14T14:51:41 Z LTTrungCHL Političari (COCI20_politicari) C++17
35 / 70
 365 ms 524288 KB 
///***LTT***///
/// ->TUYEN QUOC GIA<- ///
#include<bits/stdc++.h>
#pragma GCC optimize ("O3")
#pragma GCC optimize ("unroll-loops")
#pragma GCC target("popcnt")
#define int long long
#define endl "\n"
#define F first
#define S second
#define pb push_back
#define CHECKBIT(mask,i) ((mask>>(i) )&1) // == 1 la bat, == 0 la tat
#define OFFBIT(mask,i) ((1<<(i))^mask) // tat bit thu i
#define ONBIT(mask,i) ((1<<(i))mask) // bat bit thu i
using namespace std;
const long long oo = 1e9+7;
const int N = 2 * 1e5 + 10;
int n, a[505][505],  k;
vector <int> ans;
int t[505][505];
bool dd[505][505];
void inp(){
    cin >> n >> k;
//    assert(k <= 100000);
    for (int i = 1;i <= n;i++){
        for (int j = 1;j <= n;j++){
            cin >> a[i][j];
        }
    }
    return;
}
void case1(int u,int p,int tt){
    cout << -1;
    return;
    int len = tt - t[a[u][p]][a[a[u][p]][u]];
    int du =(k - (t[a[u][p]][a[a[u][p]][u]] ) )% len ;
    cout << ans[(t[a[u][p]][a[a[u][p]][u]]  ) + du - 1ll];
    return;
}
void solve(){
    ans.pb(1);
    ans.pb(2);
    int tt = 2;
    dd[1][2] = true;
    t[1][2] = 1;
    int p = 1;
    int u = 2;
    while (tt <= k){
        int preu = u;
        int prep = p;
        if (dd[a[u][p]][a[a[u][p]][u]]){
            case1(u, p ,tt + 1);
            return;
        }
        t[u][a[u][p]] = tt;
        u = a[u][p];
        p = preu;
        ans.pb(u);
        tt++;
    }
    cout << ans[k - 1];
    return;
}
signed main(){
    ios_base::sync_with_stdio(NULL);
    cin.tie(NULL);
    cout.tie(NULL);
    if (fopen("file.inp", "r")){
        freopen("file.inp", "r", stdin);
        freopen("file.out", "w", stdout);
    }
    //int t;
    //cin >> t;
    //while(t--){
    inp();
    solve();
    //}
}
/*
3 100000
0 3 2
3 0 1
1 2 0
*/

Compilation message

politicari.cpp: In function 'void solve()':
politicari.cpp:50:13: warning: unused variable 'prep' [-Wunused-variable]
   50 |         int prep = p;
      |             ^~~~
politicari.cpp: In function 'int main()':
politicari.cpp:69:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   69 |         freopen("file.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
politicari.cpp:70:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   70 |         freopen("file.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
35.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Runtime error 330 ms 524288 KB Execution killed with signal 9
3 Runtime error 323 ms 524288 KB Execution killed with signal 9
4 Runtime error 319 ms 524288 KB Execution killed with signal 9
5 Runtime error 356 ms 524288 KB Execution killed with signal 9
6 Runtime error 365 ms 524288 KB Execution killed with signal 9
7 Correct 1 ms 2392 KB Output is correct
8 Correct 2 ms 3416 KB Output is correct
9 Correct 4 ms 3928 KB Output is correct
10 Correct 11 ms 5344 KB Output is correct
11 Correct 15 ms 5852 KB Output is correct
12 Correct 14 ms 6360 KB Output is correct
13 Runtime error 243 ms 524288 KB Execution killed with signal 9
14 Runtime error 300 ms 524288 KB Execution killed with signal 9