Submission #1520062
Source Code Expand
#include <bits/stdc++.h> using namespace std; template<class T> inline string toString(T x) {ostringstream sout;sout<<x;return sout.str();} //typedef //------------------------------------------ typedef pair<int, int> PII; typedef pair<long, long> PLL; typedef long long LL; //container util //------------------------------------------ #define ALL(a) (a).begin(),(a).end() #define PB emplace_back #define MP make_pair #define SZ(a) int((a).size()) //repetition //------------------------------------------ #define FOR(i,a,b) for(LL i=(a);i<(b);++i) #define REP(i,n) FOR(i,0,n) #define SORT(c) sort((c).begin(),(c).end()) //constant //-------------------------------------------- //clear memory #define CLR(a) memset((a), 0 ,sizeof(a)) int main(){ int N;cin>>N; vector<PLL>b(N); REP(i,N){ LL a; cin>>a; b[i]=MP(a,i); } SORT(b); int cnt=0; REP(i,N){ auto p=b[i]; if(i%2!=p.second%2)cnt++; } cout<<cnt/2<<endl; return 0; }
Submission Info
Submission Time | |
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Task | C - BBuBBBlesort! |
User | blue0620 |
Language | C++14 (GCC 5.4.1) |
Score | 600 |
Code Size | 1065 Byte |
Status | AC |
Exec Time | 46 ms |
Memory | 1792 KB |
Judge Result
Set Name | Sample | All | ||||
---|---|---|---|---|---|---|
Score / Max Score | 0 / 0 | 600 / 600 | ||||
Status |
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Set Name | Test Cases |
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Sample | s1.txt, s2.txt |
All | 01.txt, 02.txt, 03.txt, 04.txt, 05.txt, 06.txt, 07.txt, 08.txt, 09.txt, 10.txt, 11.txt, 12.txt, 13.txt, 14.txt, 15.txt, 16.txt, 17.txt, 18.txt, 19.txt, 20.txt, 21.txt, 22.txt, s1.txt, s2.txt |
Case Name | Status | Exec Time | Memory |
---|---|---|---|
01.txt | AC | 46 ms | 1792 KB |
02.txt | AC | 46 ms | 1792 KB |
03.txt | AC | 46 ms | 1792 KB |
04.txt | AC | 46 ms | 1792 KB |
05.txt | AC | 35 ms | 1792 KB |
06.txt | AC | 35 ms | 1792 KB |
07.txt | AC | 36 ms | 1792 KB |
08.txt | AC | 31 ms | 1792 KB |
09.txt | AC | 31 ms | 1792 KB |
10.txt | AC | 30 ms | 1792 KB |
11.txt | AC | 30 ms | 1792 KB |
12.txt | AC | 30 ms | 1792 KB |
13.txt | AC | 30 ms | 1792 KB |
14.txt | AC | 36 ms | 1792 KB |
15.txt | AC | 36 ms | 1792 KB |
16.txt | AC | 36 ms | 1792 KB |
17.txt | AC | 35 ms | 1792 KB |
18.txt | AC | 1 ms | 256 KB |
19.txt | AC | 1 ms | 256 KB |
20.txt | AC | 1 ms | 256 KB |
21.txt | AC | 1 ms | 256 KB |
22.txt | AC | 1 ms | 256 KB |
s1.txt | AC | 1 ms | 256 KB |
s2.txt | AC | 1 ms | 256 KB |