Submission #890103

#	Time	Username	Problem	Language	Result	Execution time	Memory
890103		vjudge1	Coin Collecting (JOI19_ho_t4)	C++17	100 / 100	34 ms	5968 KiB

joi2019_ho_t4

#include <bits/stdc++.h>
using namespace std;
#include <ext/pb_ds/assoc_container.hpp>
#include <ext/pb_ds/tree_policy.hpp>
using namespace __gnu_pbds;
  
#define ordered_set tree<int, null_type,less<int>, rb_tree_tag,tree_order_statistics_node_update>
 
// #pragma GCC optimize("Ofast,unroll-loops,fast-math")
// #pragma GCC target("popcnt")


typedef long long ll;
typedef unsigned long long ull;
typedef long double ld;
typedef pair<ll,ll> pll;
 
#define sz size()
#define ff first
#define ss second
#define all(a) a.begin(),a.end()
#define pb push_back

const int mod = ll(1e9)+7; //(b + (a%b)) % b (to mod -1%(10^9+7) correctly in c++ its -1 but its suppose to be 10^9+6
const ll MOD = 998244353;  // (a%mod)*(binpow(b,mod-2,mod) = (a/b)%mod
const int N = ll(2e5)+10;
const long long inf = 2e18;
const long double eps = 1e-15L;
 
ll lcm(ll a, ll b) { return (a / __gcd(a,b))*b; }

ll binpow(ll a, ll b, ll m) { ll res=1; a %= m; while(b>0){ if(b&1)res=(res * a) % m; a=(a * a) % m; b/=2; } return res%m;}


void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }


int cnt[N][3];

void Baizho() {	
	int n; cin>>n;
	ll ans = 0;
	for(int i = 1; i <= n + n; i ++) {
		int x, y; cin>>x>>y;
		if(x < 1) {
			ans += 1 - x;
			x = 1;
		}
		if(y < 1) {
			ans += 1 - y;
			y = 1;
		}
		if(x > n) {
			ans += x - n;
			x = n;
		}
		if(y > 2) {
			ans += y - 2;
			y = 2;
		}
		cnt[x][y] ++;
	}
	int one = 0, two = 0;
	for(int i = 1; i <= n; i ++) {
		one += cnt[i][1] - 1;
		two += cnt[i][2] - 1;
		while(one > 0 && two < 0) {
			one --;
			two ++;
			ans ++;
		}
		while(one < 0 && two > 0) {
			one ++;
			two --;
			ans ++;
		}
		ans += abs(one) + abs(two);
	}
	cout<<ans;
	
	
}
 
signed main() {		
 
    ios_base::sync_with_stdio(false);   
    cin.tie(0);cout.tie(0); 
//   	precalc();
   	
    int ttt = 1;
//    cin>>ttt;

    for(int i=1; i<=ttt; i++) { Baizho(); }
}

Compilation message (stderr)

joi2019_ho_t4.cpp: In function 'void Freopen(std::string)':
joi2019_ho_t4.cpp:35:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                           ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
joi2019_ho_t4.cpp:35:76: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   35 | void Freopen(string Key){ freopen((Key+".in").c_str(), "r", stdin); freopen((Key+".out").c_str(), "w", stdout); }
      |                                                                     ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 8 / 8
• Subtask 2: 29 / 29
• Subtask 3: 63 / 63