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답안 #894337

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
894337 2023-12-28T06:27:36 Z vjudge1 Index (COCI21_index) C++17
110 / 110
 908 ms 11088 KB 
#include <bits/stdc++.h>
#define ll long long
#define all(a) a.begin(), a.end()
#define F first
#define S second
#define pb push_back
#define eb emplace_back
#define ull unsigned long long
#define ld long double
#define lv v+v
#define rv v+v+1
#define files freopen("expert.in", "r", stdin), freopen("expert.out", "w", stdout)
using namespace std;
const ll mod = 1e9 + 7;
const ll N = 2e5 + 10;
const ll P = 337ll;
const ld EPS = 1e-9;
const ll block = 450;
ll n,qq,a[N],ans[N], t[200000 + 10], MAXNUM=0, MINNUM = LLONG_MAX,cur = 0,l=0,r=0;
struct ask {
    ll L, R, idx;
};
ask q[N];
bool cmp(ask x, ask y) {
    if(x.L / block == y.L / block){return x.R < y.R;}
	else {return x.L < y.L;}
}
ll sum(ll k) {
    ll s = 0;
    while (k >= MINNUM) {
    s += t[k];
    k -= k&-k;
 }
 return s;
}
void add(ll k, ll val) {
 if(k<1) {
     return;
 }
 while (k <= MAXNUM) {
 t[k] += val;
 k += k&-k;
 }
}
bool check(ll t) {
    ll num = sum(MAXNUM) - sum(t-1);
    return num>=t;
}
void del(ll i) {
    add(a[i],-1);
}
void inc(ll i) {
    add(a[i],1);
}
ll answer() {
    ll l = 1, r = N;
    while(l + 1 < r) {
        ll mid = l + r >> 1LL;
        if(check(mid)) {
            l = mid;
        }
        else {
            r = mid;
        }
    }
    return l;
}
int main() {
ios_base::sync_with_stdio(false);
cin.tie(nullptr);
cout.tie(nullptr);
cin>>n>>qq;
for(ll i = 1; i<=n; i++) {
    cin>>a[i];
    MAXNUM = max(MAXNUM, a[i]);
    MINNUM = min(MINNUM, a[i]);
}
for(ll i = 1; i<=qq; i++) {
    ll l,r;
    cin>>l>>r;
    q[i].L = l;
    q[i].R = r;
    q[i].idx = i;
}
sort(q+1, q+1+qq, cmp);
for(ll i = 1; i<=qq;i++) {
    while(l < q[i].L){
        del(l++);
    }
    while(l > q[i].L){
        inc(--l);
    }
    while(r < q[i].R){
        inc(++r);
    }
    while(r > q[i].R){
        del(r--);
    }
    ans[q[i].idx] = answer();
}
for(ll i = 1; i<=qq; i++) {
    cout<<ans[i]<<"\n";
}
return 0;
}
// equal, min, max, 1, random, build
/*

*/

Compilation message

index.cpp: In function 'long long int answer()':
index.cpp:58:20: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
   58 |         ll mid = l + r >> 1LL;
      |                  ~~^~~

Subtask #1
20.0 / 20.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct

Subtask #2
40.0 / 40.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 124 ms 5460 KB Output is correct
12 Correct 125 ms 5436 KB Output is correct
13 Correct 125 ms 5444 KB Output is correct
14 Correct 123 ms 5456 KB Output is correct
15 Correct 130 ms 5244 KB Output is correct
16 Correct 127 ms 5720 KB Output is correct
17 Correct 119 ms 5456 KB Output is correct
18 Correct 121 ms 5452 KB Output is correct
19 Correct 120 ms 5456 KB Output is correct
20 Correct 126 ms 5456 KB Output is correct

Subtask #3
50.0 / 50.0

# 결과 실행 시간 메모리 Grader output
1 Correct 1 ms 2392 KB Output is correct
2 Correct 1 ms 2392 KB Output is correct
3 Correct 1 ms 2396 KB Output is correct
4 Correct 1 ms 2396 KB Output is correct
5 Correct 1 ms 2392 KB Output is correct
6 Correct 1 ms 2396 KB Output is correct
7 Correct 1 ms 2396 KB Output is correct
8 Correct 1 ms 2396 KB Output is correct
9 Correct 1 ms 2396 KB Output is correct
10 Correct 1 ms 2396 KB Output is correct
11 Correct 124 ms 5460 KB Output is correct
12 Correct 125 ms 5436 KB Output is correct
13 Correct 125 ms 5444 KB Output is correct
14 Correct 123 ms 5456 KB Output is correct
15 Correct 130 ms 5244 KB Output is correct
16 Correct 127 ms 5720 KB Output is correct
17 Correct 119 ms 5456 KB Output is correct
18 Correct 121 ms 5452 KB Output is correct
19 Correct 120 ms 5456 KB Output is correct
20 Correct 126 ms 5456 KB Output is correct
21 Correct 871 ms 10848 KB Output is correct
22 Correct 891 ms 10856 KB Output is correct
23 Correct 905 ms 11016 KB Output is correct
24 Correct 897 ms 10848 KB Output is correct
25 Correct 856 ms 10868 KB Output is correct
26 Correct 883 ms 11088 KB Output is correct
27 Correct 858 ms 10848 KB Output is correct
28 Correct 908 ms 11020 KB Output is correct
29 Correct 878 ms 11088 KB Output is correct
30 Correct 847 ms 10876 KB Output is correct