제출 #899137

#제출 시각아이디문제언어결과실행 시간메모리
899137penguin133캥거루 (CEOI16_kangaroo)C++17
6 / 100
2076 ms348 KiB
#include <bits/stdc++.h> using namespace std; #define int long long #define pi pair<int, int> #define pii pair<int, pi> #define fi first #define se second #ifdef _WIN32 #define getchar_unlocked _getchar_nolock #endif mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count()); int ans = 0, P[10]; void solve(){ int n, x, y; cin >> n >> x>> y; for(int i=1;i<=n;i++)P[i] = i; do{ bool f = 1; if(P[1] != x || P[n] != y)f = 0; if(!f)continue; int st = -1; for(int i=2;i<=n;i++){ int sg = (P[i] > P[i-1]); if(st == -1)st = sg; else if(st == sg)f = 0; st = sg; } if(f)ans++; }while(next_permutation(P + 1, P + n + 1)); cout << ans; } main(){ ios::sync_with_stdio(0);cin.tie(0); int tc = 1; //cin >> tc; for(int tc1=1;tc1<=tc;tc1++){ // cout << "Case #" << tc1 << ": "; solve(); } }

컴파일 시 표준 에러 (stderr) 메시지

kangaroo.cpp:35:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   35 | main(){
      | ^~~~
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