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Submission #432991

# Submission time Handle Problem Language Result Execution time Memory
432991 2021-06-18T17:11:33 Z wiwiho Sorting (IOI15_sorting) C++14
100 / 100
 428 ms 19728 KB 
#include "sorting.h"
 
#include <bits/stdc++.h>
 
#define printv(a, b) { \
    for(auto pv : a) b << pv << " "; \
    b << "\n"; \
}
#define mp make_pair
#define F first
#define Sc second
#define eb emplace_back
 
using namespace std;
 
typedef long long ll;
 
using pii = pair<int, int>;
 
const ll MOD = 1000000007;

vector<pii> ans;
bool calc(int n, int S[], int m, int X[], int Y[]){
    ans.clear();

    vector<int> s(n);
    for(int i = 0; i < n; i++) s[i] = S[i];
 
    vector<int> num(n);
    vector<int> pos(n);
    for(int i = 0; i < n; i++) num[i] = pos[i] = i;
    for(int i = 0; i < m; i++){
        swap(num[pos[X[i]]], num[pos[Y[i]]]);
        swap(pos[X[i]], pos[Y[i]]);
    }
 
    int cnt = 0;
    vector<int> now(n), np(n);
    for(int i = 0; i < n; i++) now[i] = i, np[i] = i;
    for(int i = 0; i < n; i++){
        while(s[i] != num[i]){
            if(cnt >= m) return false;
            swap(now[np[X[cnt]]], now[np[Y[cnt]]]);
            swap(np[X[cnt]], np[Y[cnt]]);
            cnt++;
            ans.eb(mp(now[i], now[pos[s[i]]]));
            swap(s[i], s[pos[s[i]]]);
        }
    }
    while(ans.size() < m) ans.eb(mp(0, 0));
    //cerr << "test " << m << "\n";
    //printv(num, cerr);
    //printv(s, cerr);
    return true;
}
 
int findSwapPairs(int n, int S[], int m, int X[], int Y[], int P[], int Q[]) {

    int l = 0, r = n;
    while(l < r){
        int mid = (l + r) / 2;
        bool tmp = calc(n, S, mid, X, Y);
        //cerr << mid << " " << tmp << "\n";
        if(tmp) r = mid;
        else l = mid + 1;
    }
    //cerr << "ans " << l << "\n";
    calc(n, S, l, X, Y);
 
    for(int i = 0; i < ans.size(); i++){
        P[i] = ans[i].F;
        Q[i] = ans[i].Sc;
    }
    
	return ans.size();
}

Compilation message

sorting.cpp: In function 'bool calc(int, int*, int, int*, int*)':
sorting.cpp:50:22: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   50 |     while(ans.size() < m) ans.eb(mp(0, 0));
      |           ~~~~~~~~~~~^~~
sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:70:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   70 |     for(int i = 0; i < ans.size(); i++){
      |                    ~~^~~~~~~~~~~~
sorting.cpp:75:17: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   75 |  return ans.size();
      |         ~~~~~~~~^~
sorting.cpp:57:39: warning: unused parameter 'm' [-Wunused-parameter]
   57 | int findSwapPairs(int n, int S[], int m, int X[], int Y[], int P[], int Q[]) {
      |                                   ~~~~^

Subtask #1
8.0 / 8.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct

Subtask #2
12.0 / 12.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 204 KB Output is correct

Subtask #3
16.0 / 16.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 1 ms 204 KB Output is correct
3 Correct 1 ms 204 KB Output is correct
4 Correct 1 ms 332 KB Output is correct
5 Correct 1 ms 204 KB Output is correct
6 Correct 0 ms 204 KB Output is correct

Subtask #4
18.0 / 18.0

# Verdict Execution time Memory Grader output
1 Correct 1 ms 204 KB Output is correct
2 Correct 0 ms 204 KB Output is correct
3 Correct 0 ms 204 KB Output is correct
4 Correct 0 ms 204 KB Output is correct
5 Correct 0 ms 204 KB Output is correct
6 Correct 1 ms 204 KB Output is correct
7 Correct 0 ms 204 KB Output is correct
8 Correct 1 ms 204 KB Output is correct
9 Correct 0 ms 204 KB Output is correct
10 Correct 1 ms 204 KB Output is correct
11 Correct 1 ms 332 KB Output is correct
12 Correct 1 ms 204 KB Output is correct
13 Correct 1 ms 204 KB Output is correct
14 Correct 1 ms 204 KB Output is correct
15 Correct 1 ms 204 KB Output is correct
16 Correct 1 ms 332 KB Output is correct
17 Correct 1 ms 204 KB Output is correct
18 Correct 0 ms 204 KB Output is correct
19 Correct 1 ms 204 KB Output is correct
20 Correct 0 ms 204 KB Output is correct
21 Correct 1 ms 332 KB Output is correct
22 Correct 1 ms 332 KB Output is correct
23 Correct 1 ms 332 KB Output is correct
24 Correct 1 ms 332 KB Output is correct
25 Correct 2 ms 384 KB Output is correct
26 Correct 1 ms 332 KB Output is correct
27 Correct 1 ms 332 KB Output is correct

Subtask #5
20.0 / 20.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 332 KB Output is correct
2 Correct 3 ms 444 KB Output is correct
3 Correct 2 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 2 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 2 ms 348 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct

Subtask #6
26.0 / 26.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 332 KB Output is correct
2 Correct 3 ms 444 KB Output is correct
3 Correct 2 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 2 ms 332 KB Output is correct
8 Correct 2 ms 332 KB Output is correct
9 Correct 2 ms 332 KB Output is correct
10 Correct 2 ms 332 KB Output is correct
11 Correct 2 ms 348 KB Output is correct
12 Correct 2 ms 332 KB Output is correct
13 Correct 2 ms 332 KB Output is correct
14 Correct 1 ms 332 KB Output is correct
15 Correct 265 ms 10912 KB Output is correct
16 Correct 301 ms 18364 KB Output is correct
17 Correct 428 ms 19160 KB Output is correct
18 Correct 100 ms 17264 KB Output is correct
19 Correct 248 ms 17832 KB Output is correct
20 Correct 338 ms 18928 KB Output is correct
21 Correct 291 ms 18916 KB Output is correct
22 Correct 263 ms 15344 KB Output is correct
23 Correct 294 ms 19484 KB Output is correct
24 Correct 404 ms 19392 KB Output is correct
25 Correct 394 ms 19480 KB Output is correct
26 Correct 257 ms 17976 KB Output is correct
27 Correct 216 ms 17836 KB Output is correct
28 Correct 386 ms 18972 KB Output is correct
29 Correct 372 ms 19268 KB Output is correct
30 Correct 171 ms 17840 KB Output is correct
31 Correct 376 ms 19332 KB Output is correct
32 Correct 299 ms 18836 KB Output is correct
33 Correct 393 ms 19456 KB Output is correct
34 Correct 325 ms 19312 KB Output is correct
35 Correct 260 ms 17600 KB Output is correct
36 Correct 89 ms 17896 KB Output is correct
37 Correct 402 ms 19712 KB Output is correct
38 Correct 413 ms 19728 KB Output is correct
39 Correct 401 ms 19124 KB Output is correct