oj.uz

Submission #242167

# Submission time Handle Problem Language Result Execution time Memory
242167 2020-06-27T03:58:54 Z dCoding Arranging Shoes (IOI19_shoes) C++14
100 / 100
 352 ms 275704 KB 
/**
For all shoes, greedily find the other closest pair near it.
The number of swaps required for that move is the index of the closest pair - current index - number of used shoes in between
The number of used shoes in between can be found using a segtree
*/

#include <bits/stdc++.h>
#include "shoes.h"

#define F0R(i,n) for(auto i = 0; i < (n); i++)
#define FOR(i,a,b) for(auto i = (a); i <= (b); i++)
#define ROF(i,a,b) for(auto i = (a); i >= (b); i--)
#define ll long long
#define pb push_back
#define F first
#define S second
#define vi vector<int>

using namespace std;

const int MAXN = 2e5+5;
int seg[4*MAXN];
bool used[MAXN];
queue<int> leftShoes[MAXN],rightShoes[MAXN];

void update(int node,int ss,int se,int idx) {
	if(ss > se || idx > se || idx < ss)return;
	if(ss == se) {
		++seg[node];
		return;
	}
	int mid = ss+se >> 1;
	update(node*2+1,ss,mid,idx);
	update(node*2+2,mid+1,se,idx);
	seg[node] = seg[2*node+1]+seg[2*node+2];
}

int query(int node,int ss,int se,int qs,int qe) {
	if(ss > se || qs > se || qe < ss) return 0;
	if(ss >= qs && se <= qe) return seg[node];
	int mid = ss+se >> 1;
	int q1 = query(node*2+1,ss,mid,qs,qe);
	int q2 = query(node*2+2,mid+1,se,qs,qe);
	return q1+q2;
}

ll count_swaps(vi a) {
	int n = a.size();
	F0R(i,n) {
		if(a[i] < 0) leftShoes[abs(a[i])].push(i); 
		else rightShoes[a[i]].push(i);
	}
	ll ans = 0;
	F0R(i,n) {
		if(used[i]) continue;
		int ni = -1;
		if(a[i] < 0) {
			ni = rightShoes[abs(a[i])].front();
		} else {
			ni = leftShoes[abs(a[i])].front();
		}
		rightShoes[abs(a[i])].pop();
		leftShoes[abs(a[i])].pop();
		int swapss = ni-i;
		swapss -= query(0,0,n-1,i+1,ni-1);
		
		update(0,0,n-1,i);
		update(0,0,n-1,ni);
		if(a[i] < 0)--swapss;
		used[i] = true;
		used[ni] = true;
		ans += swapss; 
	}
	return ans;
}

Compilation message

shoes.cpp: In function 'void update(int, int, int, int)':
shoes.cpp:32:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid = ss+se >> 1;
            ~~^~~
shoes.cpp: In function 'int query(int, int, int, int, int)':
shoes.cpp:41:14: warning: suggest parentheses around '+' inside '>>' [-Wparentheses]
  int mid = ss+se >> 1;
            ~~^~~

Subtask #1
10.0 / 10.0

# Verdict Execution time Memory Grader output
1 Correct 187 ms 269688 KB Output is correct
2 Correct 183 ms 269560 KB Output is correct

Subtask #2
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 187 ms 269688 KB Output is correct
2 Correct 183 ms 269560 KB Output is correct
3 Correct 187 ms 269688 KB Output is correct
4 Correct 184 ms 269560 KB Output is correct
5 Correct 187 ms 269560 KB Output is correct
6 Correct 189 ms 269560 KB Output is correct
7 Correct 188 ms 269688 KB Output is correct
8 Correct 189 ms 269688 KB Output is correct
9 Correct 186 ms 269560 KB Output is correct
10 Correct 182 ms 269560 KB Output is correct
11 Correct 188 ms 269688 KB Output is correct
12 Correct 189 ms 269560 KB Output is correct
13 Correct 188 ms 269664 KB Output is correct
14 Correct 184 ms 269560 KB Output is correct
15 Correct 192 ms 269816 KB Output is correct
16 Correct 192 ms 269560 KB Output is correct
17 Correct 185 ms 269688 KB Output is correct
18 Correct 188 ms 269560 KB Output is correct
19 Correct 185 ms 269560 KB Output is correct
20 Correct 182 ms 269620 KB Output is correct
21 Correct 184 ms 269560 KB Output is correct
22 Correct 182 ms 269688 KB Output is correct
23 Correct 182 ms 269560 KB Output is correct
24 Correct 185 ms 269688 KB Output is correct
25 Correct 184 ms 269728 KB Output is correct
26 Correct 187 ms 269560 KB Output is correct
27 Correct 183 ms 269688 KB Output is correct
28 Correct 187 ms 269688 KB Output is correct
29 Correct 185 ms 269560 KB Output is correct
30 Correct 186 ms 269560 KB Output is correct
31 Correct 189 ms 269692 KB Output is correct
32 Correct 187 ms 269688 KB Output is correct
33 Correct 182 ms 269560 KB Output is correct
34 Correct 185 ms 269560 KB Output is correct
35 Correct 187 ms 269692 KB Output is correct
36 Correct 187 ms 269560 KB Output is correct

Subtask #3
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 187 ms 269688 KB Output is correct
2 Correct 183 ms 269560 KB Output is correct
3 Correct 184 ms 269560 KB Output is correct
4 Correct 184 ms 269688 KB Output is correct
5 Correct 182 ms 269560 KB Output is correct
6 Correct 183 ms 269564 KB Output is correct
7 Correct 188 ms 269612 KB Output is correct
8 Correct 185 ms 269688 KB Output is correct
9 Correct 183 ms 269688 KB Output is correct
10 Correct 186 ms 269560 KB Output is correct
11 Correct 187 ms 269560 KB Output is correct
12 Correct 185 ms 269560 KB Output is correct
13 Correct 181 ms 269560 KB Output is correct
14 Correct 187 ms 269560 KB Output is correct
15 Correct 188 ms 269688 KB Output is correct
16 Correct 184 ms 269560 KB Output is correct
17 Correct 186 ms 269616 KB Output is correct
18 Correct 200 ms 269688 KB Output is correct
19 Correct 202 ms 269688 KB Output is correct
20 Correct 211 ms 270328 KB Output is correct
21 Correct 210 ms 270200 KB Output is correct
22 Correct 296 ms 275448 KB Output is correct
23 Correct 285 ms 275704 KB Output is correct
24 Correct 279 ms 275704 KB Output is correct
25 Correct 289 ms 275320 KB Output is correct
26 Correct 289 ms 275576 KB Output is correct
27 Correct 275 ms 275324 KB Output is correct
28 Correct 285 ms 275576 KB Output is correct
29 Correct 281 ms 275576 KB Output is correct
30 Correct 285 ms 275576 KB Output is correct
31 Correct 289 ms 275448 KB Output is correct
32 Correct 279 ms 275576 KB Output is correct
33 Correct 299 ms 275320 KB Output is correct
34 Correct 279 ms 275576 KB Output is correct
35 Correct 184 ms 269688 KB Output is correct
36 Correct 188 ms 269688 KB Output is correct
37 Correct 288 ms 275576 KB Output is correct
38 Correct 284 ms 275576 KB Output is correct
39 Correct 284 ms 275576 KB Output is correct

Subtask #4
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 183 ms 269560 KB Output is correct
2 Correct 188 ms 269688 KB Output is correct
3 Correct 182 ms 269560 KB Output is correct
4 Correct 188 ms 269560 KB Output is correct
5 Correct 319 ms 274680 KB Output is correct
6 Correct 292 ms 274680 KB Output is correct
7 Correct 314 ms 274680 KB Output is correct
8 Correct 283 ms 275576 KB Output is correct
9 Correct 316 ms 274680 KB Output is correct
10 Correct 314 ms 274808 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 187 ms 269688 KB Output is correct
2 Correct 183 ms 269560 KB Output is correct
3 Correct 187 ms 269688 KB Output is correct
4 Correct 184 ms 269560 KB Output is correct
5 Correct 187 ms 269560 KB Output is correct
6 Correct 189 ms 269560 KB Output is correct
7 Correct 188 ms 269688 KB Output is correct
8 Correct 189 ms 269688 KB Output is correct
9 Correct 186 ms 269560 KB Output is correct
10 Correct 182 ms 269560 KB Output is correct
11 Correct 188 ms 269688 KB Output is correct
12 Correct 189 ms 269560 KB Output is correct
13 Correct 188 ms 269664 KB Output is correct
14 Correct 184 ms 269560 KB Output is correct
15 Correct 192 ms 269816 KB Output is correct
16 Correct 192 ms 269560 KB Output is correct
17 Correct 185 ms 269688 KB Output is correct
18 Correct 188 ms 269560 KB Output is correct
19 Correct 185 ms 269560 KB Output is correct
20 Correct 182 ms 269620 KB Output is correct
21 Correct 184 ms 269560 KB Output is correct
22 Correct 182 ms 269688 KB Output is correct
23 Correct 182 ms 269560 KB Output is correct
24 Correct 185 ms 269688 KB Output is correct
25 Correct 184 ms 269728 KB Output is correct
26 Correct 187 ms 269560 KB Output is correct
27 Correct 183 ms 269688 KB Output is correct
28 Correct 187 ms 269688 KB Output is correct
29 Correct 185 ms 269560 KB Output is correct
30 Correct 186 ms 269560 KB Output is correct
31 Correct 189 ms 269692 KB Output is correct
32 Correct 187 ms 269688 KB Output is correct
33 Correct 182 ms 269560 KB Output is correct
34 Correct 185 ms 269560 KB Output is correct
35 Correct 187 ms 269692 KB Output is correct
36 Correct 187 ms 269560 KB Output is correct
37 Correct 182 ms 269560 KB Output is correct
38 Correct 187 ms 269560 KB Output is correct
39 Correct 188 ms 269688 KB Output is correct
40 Correct 181 ms 269560 KB Output is correct
41 Correct 185 ms 269688 KB Output is correct
42 Correct 184 ms 269816 KB Output is correct
43 Correct 185 ms 269688 KB Output is correct
44 Correct 190 ms 269688 KB Output is correct
45 Correct 186 ms 269688 KB Output is correct
46 Correct 190 ms 269688 KB Output is correct
47 Correct 186 ms 269620 KB Output is correct
48 Correct 188 ms 269688 KB Output is correct
49 Correct 186 ms 269688 KB Output is correct
50 Correct 201 ms 269688 KB Output is correct
51 Correct 199 ms 269688 KB Output is correct
52 Correct 185 ms 269688 KB Output is correct

Subtask #6
15.0 / 15.0

# Verdict Execution time Memory Grader output
1 Correct 187 ms 269688 KB Output is correct
2 Correct 183 ms 269560 KB Output is correct
3 Correct 187 ms 269688 KB Output is correct
4 Correct 184 ms 269560 KB Output is correct
5 Correct 187 ms 269560 KB Output is correct
6 Correct 189 ms 269560 KB Output is correct
7 Correct 188 ms 269688 KB Output is correct
8 Correct 189 ms 269688 KB Output is correct
9 Correct 186 ms 269560 KB Output is correct
10 Correct 182 ms 269560 KB Output is correct
11 Correct 188 ms 269688 KB Output is correct
12 Correct 189 ms 269560 KB Output is correct
13 Correct 188 ms 269664 KB Output is correct
14 Correct 184 ms 269560 KB Output is correct
15 Correct 192 ms 269816 KB Output is correct
16 Correct 192 ms 269560 KB Output is correct
17 Correct 185 ms 269688 KB Output is correct
18 Correct 188 ms 269560 KB Output is correct
19 Correct 185 ms 269560 KB Output is correct
20 Correct 182 ms 269620 KB Output is correct
21 Correct 184 ms 269560 KB Output is correct
22 Correct 182 ms 269688 KB Output is correct
23 Correct 182 ms 269560 KB Output is correct
24 Correct 185 ms 269688 KB Output is correct
25 Correct 184 ms 269728 KB Output is correct
26 Correct 187 ms 269560 KB Output is correct
27 Correct 183 ms 269688 KB Output is correct
28 Correct 187 ms 269688 KB Output is correct
29 Correct 185 ms 269560 KB Output is correct
30 Correct 186 ms 269560 KB Output is correct
31 Correct 189 ms 269692 KB Output is correct
32 Correct 187 ms 269688 KB Output is correct
33 Correct 182 ms 269560 KB Output is correct
34 Correct 185 ms 269560 KB Output is correct
35 Correct 187 ms 269692 KB Output is correct
36 Correct 187 ms 269560 KB Output is correct
37 Correct 184 ms 269560 KB Output is correct
38 Correct 184 ms 269688 KB Output is correct
39 Correct 182 ms 269560 KB Output is correct
40 Correct 183 ms 269564 KB Output is correct
41 Correct 188 ms 269612 KB Output is correct
42 Correct 185 ms 269688 KB Output is correct
43 Correct 183 ms 269688 KB Output is correct
44 Correct 186 ms 269560 KB Output is correct
45 Correct 187 ms 269560 KB Output is correct
46 Correct 185 ms 269560 KB Output is correct
47 Correct 181 ms 269560 KB Output is correct
48 Correct 187 ms 269560 KB Output is correct
49 Correct 188 ms 269688 KB Output is correct
50 Correct 184 ms 269560 KB Output is correct
51 Correct 186 ms 269616 KB Output is correct
52 Correct 200 ms 269688 KB Output is correct
53 Correct 202 ms 269688 KB Output is correct
54 Correct 211 ms 270328 KB Output is correct
55 Correct 210 ms 270200 KB Output is correct
56 Correct 296 ms 275448 KB Output is correct
57 Correct 285 ms 275704 KB Output is correct
58 Correct 279 ms 275704 KB Output is correct
59 Correct 289 ms 275320 KB Output is correct
60 Correct 289 ms 275576 KB Output is correct
61 Correct 275 ms 275324 KB Output is correct
62 Correct 285 ms 275576 KB Output is correct
63 Correct 281 ms 275576 KB Output is correct
64 Correct 285 ms 275576 KB Output is correct
65 Correct 289 ms 275448 KB Output is correct
66 Correct 279 ms 275576 KB Output is correct
67 Correct 299 ms 275320 KB Output is correct
68 Correct 279 ms 275576 KB Output is correct
69 Correct 184 ms 269688 KB Output is correct
70 Correct 188 ms 269688 KB Output is correct
71 Correct 288 ms 275576 KB Output is correct
72 Correct 284 ms 275576 KB Output is correct
73 Correct 284 ms 275576 KB Output is correct
74 Correct 183 ms 269560 KB Output is correct
75 Correct 188 ms 269688 KB Output is correct
76 Correct 182 ms 269560 KB Output is correct
77 Correct 188 ms 269560 KB Output is correct
78 Correct 319 ms 274680 KB Output is correct
79 Correct 292 ms 274680 KB Output is correct
80 Correct 314 ms 274680 KB Output is correct
81 Correct 283 ms 275576 KB Output is correct
82 Correct 316 ms 274680 KB Output is correct
83 Correct 314 ms 274808 KB Output is correct
84 Correct 182 ms 269560 KB Output is correct
85 Correct 187 ms 269560 KB Output is correct
86 Correct 188 ms 269688 KB Output is correct
87 Correct 181 ms 269560 KB Output is correct
88 Correct 185 ms 269688 KB Output is correct
89 Correct 184 ms 269816 KB Output is correct
90 Correct 185 ms 269688 KB Output is correct
91 Correct 190 ms 269688 KB Output is correct
92 Correct 186 ms 269688 KB Output is correct
93 Correct 190 ms 269688 KB Output is correct
94 Correct 186 ms 269620 KB Output is correct
95 Correct 188 ms 269688 KB Output is correct
96 Correct 186 ms 269688 KB Output is correct
97 Correct 201 ms 269688 KB Output is correct
98 Correct 199 ms 269688 KB Output is correct
99 Correct 185 ms 269688 KB Output is correct
100 Correct 190 ms 269688 KB Output is correct
101 Correct 194 ms 270200 KB Output is correct
102 Correct 193 ms 270200 KB Output is correct
103 Correct 344 ms 274804 KB Output is correct
104 Correct 316 ms 274808 KB Output is correct
105 Correct 336 ms 274680 KB Output is correct
106 Correct 315 ms 274612 KB Output is correct
107 Correct 302 ms 274936 KB Output is correct
108 Correct 300 ms 274808 KB Output is correct
109 Correct 288 ms 275576 KB Output is correct
110 Correct 286 ms 275576 KB Output is correct
111 Correct 329 ms 274680 KB Output is correct
112 Correct 352 ms 274888 KB Output is correct
113 Correct 317 ms 274808 KB Output is correct
114 Correct 320 ms 274808 KB Output is correct
115 Correct 319 ms 274680 KB Output is correct