// No bits/stdc++.h because clang
#include <iostream>
#include <vector>
#include <algorithm>
#include <string>
#include <set>
#include <map>
#include <queue>
#include <stack>
#include <cmath>
#include <cstring>
#include <iomanip>
#include <unordered_map>
#include <unordered_set>
#include <bitset>
#include <numeric>
#include <cassert>
#include <random>
#include <type_traits>
#include <list>
#include <tuple>
#include <climits>
// I don't know how any of these work, but its nice to have them
#pragma GCC optimize("Ofast,unroll-loops,no-stack-protector,fast-math,inline,unsafe-math-optimizations")
#pragma GCC target("avx,avx2,fma,sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
template <typename T>
void debug(T &x, std::string name = "")
{
if (name == "")
std::cerr << ":= " << x << "\n";
else
std::cerr << name << " = " << x << "\n";
}
template <typename T>
void debugArr(T &arr, int n = -1, std::string name = "")
{
if (n == -1)
n = sizeof(arr) / sizeof(arr[0]);
if (name == "")
std::cerr << ":= ";
else
std::cerr << name << " = ";
std::cerr << "[";
for (int i = 0; i < n; i++)
std::cerr << arr[i] << ","[i == n - 1];
std::cerr << "]"
<< "\n";
}
template <typename T>
void debugArr(std::vector<T> &arr, int n = -1, std::string name = "")
{
if (n == -1)
n = arr.size();
if (name == "")
std::cerr << ":= ";
else
std::cerr << name << " = ";
std::cerr << "[";
for (int i = 0; i < n; i++)
std::cerr << arr[i] << ","[i == n - 1];
std::cerr << "]"
<< "\n";
}
using namespace std;
/******************* Uncomment this for long long (TLE) *******************/
// #define int long long
#define vint vector<int>
#define pint pair<int, int>
#define mint map<int, int>
#define sint set<int>
#define msint multiset<int>
#define qint queue<int>
#define pqint priority_queue<int>
#define lint list<int>
#define stint stack<int>
#define gint greater<int>
#define pb push_back
#define mp make_pair
#define f first
#define s second
#define guv \
int u, v; \
cin >> u >> v
#define sz(x) (int)x.size()
#define cinarr(x, n) \
for (int i = 0; i < n; i++) \
cin >> x[i]
#define coutarr(x, n) \
for (int i = 0; i < n; i++) \
cout << x[i] << " "; \
cout << endl
#define all(x) x.begin(), x.end()
#define rall(x) x.rbegin(), x.rend()
#define _reset(x, y) memset(x, y, sizeof(x))
#define _mid ((l + r) >> 1)
#define endl "\n"
#define FASTIO ios_base::sync_with_stdio(false), cin.tie(nullptr), cout.tie(nullptr)
#define FILEIO freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
inline void swap(int &a, int &b)
{
a ^= b;
b ^= a;
a ^= b;
}
inline int gcd(int a, int b)
{
while (b)
{
a %= b;
swap(a, b);
}
return a;
}
/*
_____ ____ ____ ____ _ _ ____ _ __
/ __// _ \/ _ \/ _ \ / \ / \ /\/ _\/ |/ /
| | _| / \|| / \|| | \| | | | | ||| / | /
| |_//| \_/|| \_/|| |_/| | |_/\| \_/|| \_ | \
\____\____/\____/\____/ \____/\____/\____/\_|\_\
*/
inline void solve()
{
int n, k;
cin >> n >> k;
int a[n + 1][n + 1];
for (int i = 1; i <= n; ++i)
{
for (int j = 1; j <= n; ++j)
{
cin >> a[i][j];
}
}
if (k <= 2)
{
cout << k << endl;
return;
}
bool vis[n + 1][n + 1]; // now, last
_reset(vis, false);
int last = 2;
int now = a[2][1];
vint v;
v.push_back(1);
v.push_back(2);
v.push_back(now);
vis[now][last] = true;
vis[2][1] = true;
int len = 3;
for (int i = 3; i <= k * 2; ++i)
{
int temp = now;
now = a[now][last];
last = temp;
if (vis[now][last])
{
--len;
break;
}
v.push_back(now);
vis[now][last] = true;
++len;
// cout << "i: " << i << " now: " << now << " last: " << last << endl;
}
// print v
/* for (int i = 0; i < len; ++i)
{
cout << v[i] << " ";
}
cout << endl; */
cout << v[(k - 1) % len] << endl;
// My code is not working!!! Try these fixes:
// 1. Check for overflow (uncommenct #define int long long)
// 2. Check for array bounds
// 3. Check for array indexes, 1-indexed or 0-indexed?
// 4. Check for special cases (n=1?)
// 5. Check for multiple test cases (remember to clear global variables)
// 6. Check the limits of your data types maybe l <= r, maybe 0 <= n...
// Getting TLE? Try these fixes:
// 1. Delete the line: #define int long long
// 2. Use array instead of vector
// Getting WA? Good luck, you're on your own
}
signed main()
{
int t = 1;
FASTIO;
/******************* Uncomment this if you want to read from input.txt ********************/
#ifndef ONLINE_JUDGE
FILEIO;
#endif
/***************** Uncomment this if you want to test multiple test cases *****************/
// cin >> t;
for (int i = 1; i <= t; i++)
{
/**************** Uncomment this if you want to print the case number ****************/
// cout << "Case " << i << ":" << endl;
solve();
}
return '0' ^ '0';
}
Compilation message
politicari.cpp: In function 'int main()':
politicari.cpp:101:23: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
101 | #define FILEIO freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~
politicari.cpp:200:5: note: in expansion of macro 'FILEIO'
200 | FILEIO;
| ^~~~~~
politicari.cpp:101:57: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
101 | #define FILEIO freopen("input.txt", "r", stdin), freopen("output.txt", "w", stdout)
| ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~
politicari.cpp:200:5: note: in expansion of macro 'FILEIO'
200 | FILEIO;
| ^~~~~~
| # |
Verdict |
Execution time |
Memory |
Grader output |
| 1 |
Runtime error |
181 ms |
524288 KB |
Execution killed with signal 9 |
| 2 |
Runtime error |
188 ms |
524288 KB |
Execution killed with signal 9 |
| 3 |
Runtime error |
294 ms |
524288 KB |
Execution killed with signal 9 |
| 4 |
Runtime error |
212 ms |
524288 KB |
Execution killed with signal 9 |
| 5 |
Runtime error |
253 ms |
524288 KB |
Execution killed with signal 9 |
| 6 |
Runtime error |
218 ms |
524288 KB |
Execution killed with signal 9 |
| 7 |
Runtime error |
189 ms |
524288 KB |
Execution killed with signal 9 |
| 8 |
Runtime error |
189 ms |
524288 KB |
Execution killed with signal 9 |
| 9 |
Runtime error |
202 ms |
524288 KB |
Execution killed with signal 9 |
| 10 |
Runtime error |
197 ms |
524288 KB |
Execution killed with signal 9 |
| 11 |
Runtime error |
190 ms |
524288 KB |
Execution killed with signal 9 |
| 12 |
Runtime error |
206 ms |
524288 KB |
Execution killed with signal 9 |
| 13 |
Runtime error |
207 ms |
524288 KB |
Execution killed with signal 9 |
| 14 |
Runtime error |
202 ms |
524288 KB |
Execution killed with signal 9 |
