Submission #387145

#TimeUsernameProblemLanguageResultExecution timeMemory
387145ismoilovArranging Shoes (IOI19_shoes)C++14
10 / 100
1 ms364 KiB
#include "shoes.h" #include<bits/stdc++.h> using namespace std; typedef long long ll; typedef pair<int, int> pii; typedef pair<ll, ll> pll; #define IOS ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL); #define all(x) (x).begin(), (x).end() #define rall(x) (x).begin(), (x).end() #define fp(a,i,c) for(int (a) = (i); (a) < (c); (a)++) #define fpp(a,i,c) for(int (a) = (i); (a) <= (c); (a)++) #define fv(c) for(int (a) = (1); (a) <= (c); (a)++) #define fz(c) for(int (a) = (0); (a) < (c); (a)++) #define fm(a,i,c) for(int (a) = (i); (a) > (c); (a)--) #define fmm(a,i,c) for(int (a) = (i); (a) >= (c); (a)--) #define pb push_back #define in insert #define ss second #define ff first long long count_swaps(vector<int> s) { ll ans = 0; int n = s.size(); vector <int> v[2*n+1]; vector <int> a; fp(i,0,n){ if(s[i] < 0) v[-s[i]+n].pb(i); else v[s[i]].pb(i), a.pb(s[i]); } for(auto it : a){ while(!v[it].empty()){ int x = v[it].back(), y = v[it+n].back(); v[it].pop_back(), v[it+n].pop_back(); if(x > y) ans += x - y - 1; else ans += y - x; } } return ans; }

Compilation message (stderr)

shoes.cpp: In function 'long long int count_swaps(std::vector<int>)':
shoes.cpp:10:27: warning: unnecessary parentheses in declaration of 'i' [-Wparentheses]
   10 | #define fp(a,i,c) for(int (a) = (i); (a) < (c); (a)++)
      |                           ^
shoes.cpp:26:2: note: in expansion of macro 'fp'
   26 |  fp(i,0,n){
      |  ^~
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