oj.uz

답안 #312507

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
312507 2020-10-13T15:15:43 Z brkdnmz Baloni (COCI15_baloni) C++17
100 / 100
 79 ms 7800 KB 
#include <iostream>
#include <fstream>
#include <cstdio>
#include <vector>
#include <map>
#include <unordered_map>
#include <set>
#include <unordered_set>
#include <stack>
#include <queue>
#include <algorithm>
#include <string.h>
#include <string>
#include <math.h>
#include <iomanip>
#include <cassert>
#include <random>
#include <time.h>
using namespace std;

#define SORT(v) sort((v).begin(), (v).end())
#define RSORT(v) sort((v).rbegin(), (v).rend())
#define REVERSE(v) reverse((v).begin(), (v).end())
#define pb push_back
#define FOR(i, n) for(int i = 0; i < (n); i++)
typedef pair<int, int> pii;
typedef long long ll;
typedef unsigned long long ull;
typedef vector<int> vi;

const int mod = 1e9 + 7;
const int mod2 = 998244353;

void fact_init(int n, int md);
ll exp(ll taban, ll us, ll md);
ll ebob(ll a, ll b);
ll ekok(ll a, ll b);
ll komb(ll a, ll b);

vector<ll> fact;
vector<ll> inv_fact;
void fact_init(int n, int md){
    fact.resize(n+5);
    inv_fact.resize(n+5);
    fact[0] = inv_fact[0] = 1;
    for(int i = 1; i <= n; i++){
        fact[i] = (fact[i-1] * i) % md;
        inv_fact[i] = exp(fact[i], md-2, md);
    }
}
ll exp(ll taban, ll us, ll md) {
    ll carpan = taban % md;
    if(carpan == 0) return 0;
    ll temp = us;
    ll res = 1;
    while(temp){
        if(temp % 2) res = (res*carpan) % md;
        temp /= 2;
        carpan = (carpan*carpan) % md;
    }
    return res;
}
 
ll ebob(ll a, ll b){
    if(!a)return b;
    return ebob(b%a, a);
}

ll ekok(ll a, ll b){
    return (a*b)/ebob(a, b);
}

ll komb(int a, int b, int md){
    if(a < b) return 0;
    return fact[a] * (inv_fact[a-b] * inv_fact[b] % md) % md;
}

ll mul(ll a, ll b, int md){
	return a*b % md;
}
const int N = 1e6 + 5;

int main(){
    ios::sync_with_stdio(false); cin.tie(NULL);
	int n; cin>>n;
	int cnt[N] = {};
	int res = 0;
	for(int i = 0; i < n; i++){
		int b; cin>>b;
		if(cnt[b]){
			cnt[b]--;
		}else{
			res++;
		}
		cnt[b-1]++;
	}
	cout<<res<<"\n";
}

Subtask #1
100.0 / 100.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 4224 KB Output is correct
2 Correct 3 ms 4224 KB Output is correct
3 Correct 3 ms 4224 KB Output is correct
4 Correct 3 ms 4224 KB Output is correct
5 Correct 76 ms 7800 KB Output is correct
6 Correct 72 ms 7800 KB Output is correct
7 Correct 59 ms 7036 KB Output is correct
8 Correct 79 ms 7032 KB Output is correct
9 Correct 68 ms 7420 KB Output is correct
10 Correct 68 ms 7416 KB Output is correct