oj.uz

Submission #448580

# Submission time Handle Problem Language Result Execution time Memory
448580 2021-07-30T20:59:10 Z SirCovidThe19th Dancing Elephants (IOI11_elephants) C++14
100 / 100
 4274 ms 18660 KB 
#include <bits/stdc++.h>
using namespace std; 
 
#define ar2 array<int, 2>
#define lb(v, x) lower_bound(v.begin(), v.end(), x)-v.begin()
 
const int mx = 1.5e5+5, sq = 555, mBL = mx/sq+5;
 
int N, L, X[mx], R[mx], mxB, reset; vector<int> blk[mBL]; vector<ar2> dp[mBL]; map<int, int> mp;
 
void calc(int b){
    int sz = blk[b].size(); dp[b].clear(); dp[b].resize(sz);
    for (int i = sz-1, p = sz-1; i >= 0; i--){
        while (blk[b][p]-blk[b][i] > L) p--;
        dp[b][i] = (p == sz-1) ? ar2{1, blk[b][i]+L} : ar2{dp[b][p+1][0]+1, dp[b][p+1][1]};
    }
}
void build(){
    mxB = 0; blk[mxB].clear();
    for (auto i : mp){
        if (blk[mxB].size() >= sq) blk[++mxB].clear();
        blk[mxB].push_back(i.first);
    }for (int i = 0; i <= mxB; i++) calc(i), R[i] = (i == mxB) ? 2e9 : blk[i].back();
}
void upd(int x, bool ins){
    int b = 0; while (x > R[b]) b++;  
    int p = lb(blk[b], x);
    ins ? blk[b].insert(blk[b].begin()+p, x) : blk[b].erase(blk[b].begin()+p);
    calc(b);
}
int query(){ 
    int ans = 0;
    for (int b = 0, x = -1; b <= mxB; b++){
        int p = lb(blk[b], x+1);
        if (p != blk[b].size()) x = dp[b][p][1], ans += dp[b][p][0];
    }return ans;
}
void init(int n, int l, int x[]){
    N = n; L = l; 
    for (int i = 0; i < n; i++) X[i] = x[i], mp[X[i]]++;
    build();
}
int update(int i, int y){
    if (++reset == sq) build(), reset = 0;
    mp[X[i]]--; 
    if (!mp[X[i]]) upd(X[i], 0), mp.erase(X[i]);
    if (!mp[y]) upd(y, 1);
    mp[y]++; 
    X[i] = y; return query();
}

Compilation message

elephants.cpp: In function 'int query()':
elephants.cpp:35:15: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   35 |         if (p != blk[b].size()) x = dp[b][p][1], ans += dp[b][p][0];
      |             ~~^~~~~~~~~~~~~~~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct

Subtask #2
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct

Subtask #3
24.0 / 24.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 283 ms 1804 KB Output is correct
8 Correct 321 ms 2420 KB Output is correct
9 Correct 433 ms 4404 KB Output is correct
10 Correct 311 ms 4424 KB Output is correct
11 Correct 339 ms 4452 KB Output is correct
12 Correct 758 ms 4552 KB Output is correct
13 Correct 327 ms 4476 KB Output is correct

Subtask #4
47.0 / 47.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 283 ms 1804 KB Output is correct
8 Correct 321 ms 2420 KB Output is correct
9 Correct 433 ms 4404 KB Output is correct
10 Correct 311 ms 4424 KB Output is correct
11 Correct 339 ms 4452 KB Output is correct
12 Correct 758 ms 4552 KB Output is correct
13 Correct 327 ms 4476 KB Output is correct
14 Correct 239 ms 2312 KB Output is correct
15 Correct 487 ms 4344 KB Output is correct
16 Correct 1076 ms 6624 KB Output is correct
17 Correct 1148 ms 8352 KB Output is correct
18 Correct 1297 ms 8388 KB Output is correct
19 Correct 654 ms 8252 KB Output is correct
20 Correct 1217 ms 8544 KB Output is correct
21 Correct 1243 ms 8304 KB Output is correct
22 Correct 615 ms 7708 KB Output is correct

Subtask #5
3.0 / 3.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 332 KB Output is correct
2 Correct 0 ms 332 KB Output is correct
3 Correct 0 ms 332 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 332 KB Output is correct
6 Correct 1 ms 332 KB Output is correct
7 Correct 283 ms 1804 KB Output is correct
8 Correct 321 ms 2420 KB Output is correct
9 Correct 433 ms 4404 KB Output is correct
10 Correct 311 ms 4424 KB Output is correct
11 Correct 339 ms 4452 KB Output is correct
12 Correct 758 ms 4552 KB Output is correct
13 Correct 327 ms 4476 KB Output is correct
14 Correct 239 ms 2312 KB Output is correct
15 Correct 487 ms 4344 KB Output is correct
16 Correct 1076 ms 6624 KB Output is correct
17 Correct 1148 ms 8352 KB Output is correct
18 Correct 1297 ms 8388 KB Output is correct
19 Correct 654 ms 8252 KB Output is correct
20 Correct 1217 ms 8544 KB Output is correct
21 Correct 1243 ms 8304 KB Output is correct
22 Correct 615 ms 7708 KB Output is correct
23 Correct 2898 ms 18056 KB Output is correct
24 Correct 2936 ms 18092 KB Output is correct
25 Correct 2269 ms 17904 KB Output is correct
26 Correct 2382 ms 17648 KB Output is correct
27 Correct 2527 ms 17484 KB Output is correct
28 Correct 1348 ms 5424 KB Output is correct
29 Correct 1295 ms 5444 KB Output is correct
30 Correct 1347 ms 5416 KB Output is correct
31 Correct 1307 ms 5492 KB Output is correct
32 Correct 2160 ms 17140 KB Output is correct
33 Correct 1539 ms 18660 KB Output is correct
34 Correct 1979 ms 17248 KB Output is correct
35 Correct 948 ms 17528 KB Output is correct
36 Correct 75 ms 7656 KB Output is correct
37 Correct 1438 ms 17452 KB Output is correct
38 Correct 1952 ms 16248 KB Output is correct
39 Correct 2237 ms 17320 KB Output is correct
40 Correct 2102 ms 16352 KB Output is correct
41 Correct 4133 ms 17492 KB Output is correct
42 Correct 4274 ms 17820 KB Output is correct