Submission #1559177
Source Code Expand
#include <bits/stdc++.h> using namespace std; #define rep(i,x,y) for(int i=(x);i<(y);++i) #define debug(x) #x << "=" << (x) #ifdef DEBUG #define _GLIBCXX_DEBUG #define print(x) std::cerr << debug(x) << " (L:" << __LINE__ << ")" << std::endl #else #define print(x) #endif const int inf=1e9; const int64_t inf64=1e18; const double eps=1e-9; template <typename T> ostream &operator<<(ostream &os, const vector<T> &vec){ os << "["; for (const auto &v : vec) { os << v << ","; } os << "]"; return os; } using i64=int64_t; void solve(){ int N; cin >> N; vector<int> p(N); vector<bool> b(N); rep(i,0,N){ cin >> p[i]; --p[i]; if(p[i]==i) b[i]=true; } int ans=0; rep(i,0,N){ if(!b[i]) continue; ++ans; b[i]=false; if(i+1<N and b[i+1]) b[i+1]=false; } cout << ans << endl; } int main(){ std::cin.tie(0); std::ios::sync_with_stdio(false); cout.setf(ios::fixed); cout.precision(16); solve(); return 0; }
Submission Info
Submission Time | |
---|---|
Task | D - Derangement |
User | walkre |
Language | C++14 (GCC 5.4.1) |
Score | 400 |
Code Size | 1104 Byte |
Status | AC |
Exec Time | 10 ms |
Memory | 768 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 400 / 400 | ||||
Status |
|
|
Set Name | Test Cases |
---|---|
Sample | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt |
All | 0_000.txt, 0_001.txt, 0_002.txt, 0_003.txt, 1_004.txt, 1_005.txt, 1_006.txt, 1_007.txt, 1_008.txt, 1_009.txt, 1_010.txt, 1_011.txt, 1_012.txt, 1_013.txt, 1_014.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
0_000.txt | AC | 1 ms | 256 KB |
0_001.txt | AC | 1 ms | 256 KB |
0_002.txt | AC | 1 ms | 256 KB |
0_003.txt | AC | 1 ms | 256 KB |
1_004.txt | AC | 1 ms | 256 KB |
1_005.txt | AC | 9 ms | 640 KB |
1_006.txt | AC | 9 ms | 640 KB |
1_007.txt | AC | 9 ms | 640 KB |
1_008.txt | AC | 9 ms | 640 KB |
1_009.txt | AC | 9 ms | 640 KB |
1_010.txt | AC | 9 ms | 640 KB |
1_011.txt | AC | 9 ms | 768 KB |
1_012.txt | AC | 9 ms | 640 KB |
1_013.txt | AC | 10 ms | 640 KB |
1_014.txt | AC | 9 ms | 640 KB |