이 제출은 이전 버전의 oj.uz에서 채점하였습니다. 현재는 제출 당시와는 다른 서버에서 채점을 하기 때문에, 다시 제출하면 결과가 달라질 수도 있습니다.
#include <bits/stdc++.h>
using namespace std;
#pragma GCC optimize("O3,unroll-loops")
// #pragma GCC target("avx2,bmi,bmi2,lzcnt,popcnt")
// Ofast, O0, O1, O2, O3, unroll-loops, fast-math, trapv
typedef long long ll;
typedef pair<ll, ll> pll;
typedef pair<int, int> pii;
#define Mp make_pair
#define sep ' '
#define endl '\n'
#define F first
#define S second
#define pb push_back
#define all(x) (x).begin(),(x).end()
#define kill(res) cout << res << '\n', exit(0);
#define set_dec(x) cout << fixed << setprecision(x);
#define fast_io ios_base::sync_with_stdio(false);cin.tie(0);cout.tie(0);
#define file_io freopen("input.txt", "r", stdin) ; freopen("output.txt", "w", stdout);
mt19937 rng(chrono::steady_clock::now().time_since_epoch().count());
const ll N = 2e5 + 50;
const ll Mod = 1e9 + 7;
ll n, a[N], cnt[N];
vector<int> vec, block;
int main(){
fast_io;
cin >> n;
for(int i = 1; i <= n; i++){
cin >> a[i]; vec.pb(a[i]);
}
sort(all(vec));
vec.resize(unique(all(vec)) - vec.begin());
for(int i = 1; i <= n; i++) a[i] = lower_bound(all(vec), a[i]) - vec.begin() + 1;
block.pb(1); cnt[a[1]]++;
for(int i = 2; i <= n; i++){
if(cnt[a[i]]){
while(a[block.back()] != a[i]){
cnt[a[block.back()]]--; block.pop_back();
}
}
else{
block.pb(i); cnt[a[i]]++;
}
}
block.pb(n+1);
for(int i = 0; i < block.size()-1; i++){
for(int j = block[i]; j < block[i+1]; j++) cout << vec[a[block[i]]-1] << endl;
}
}
컴파일 시 표준 에러 (stderr) 메시지
Main.cpp: In function 'int main()':
Main.cpp:60:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
60 | for(int i = 0; i < block.size()-1; i++){
| ~~^~~~~~~~~~~~~~~~
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