oj.uz

Submission #849403

# Submission time Handle Problem Language Result Execution time Memory
849403 2023-09-14T14:59:18 Z vjudge1 Političari (COCI20_politicari) C++17
70 / 70
 14 ms 4696 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){
    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;
        dd[u][a[u][p]] = 1;
        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:48:13: warning: unused variable 'prep' [-Wunused-variable]
   48 |         int prep = p;
      |             ^~~~
politicari.cpp: In function 'int main()':
politicari.cpp:68:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   68 |         freopen("file.inp", "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~
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.out", "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 3 ms 3416 KB Output is correct
3 Correct 8 ms 4184 KB Output is correct
4 Correct 11 ms 4440 KB Output is correct
5 Correct 13 ms 4440 KB Output is correct
6 Correct 13 ms 4440 KB Output is correct
7 Correct 1 ms 2392 KB Output is correct
8 Correct 2 ms 2904 KB Output is correct
9 Correct 3 ms 3416 KB Output is correct
10 Correct 14 ms 4440 KB Output is correct
11 Correct 12 ms 4444 KB Output is correct
12 Correct 12 ms 4696 KB Output is correct
13 Correct 1 ms 2652 KB Output is correct
14 Correct 1 ms 2904 KB Output is correct