Submission #1039849

#	Time	Username	Problem	Language	Result	Execution time	Memory
1039849		c2zi6	Sorting (IOI15_sorting)	C++14	20 / 100	3 ms	348 KiB

sorting

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<typename T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "sorting.h"

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    int n = N;
    VI a(n);
    rep(i, n) a[i] = S[i];
    VI ind(n);
    rep(i, n) ind[a[i]] = i;
    VPI ans;
    rep(i, n) {
        /*if (i == ind[i]) continue;*/
        ans.pb({i, ind[i]});
        swap(a[i], a[ind[i]]);
        rep(i, n) ind[a[i]] = i;
    }
    while (ans.size() && ans.back().ff == ans.back().ss) ans.pop_back();
    rep(i, ans.size()) {
        P[i] = ans[i].ff;
        Q[i] = ans[i].ss;
    }
	return ans.size();
}

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:45:13: warning: declaration of 'i' shadows a previous local [-Wshadow]
   45 |         rep(i, n) ind[a[i]] = i;
      |             ^
sorting.cpp:9:28: note: in definition of macro 'rep'
    9 | #define rep(i, n) for (int i = 0; i < int(n); ++i)
      |                            ^
sorting.cpp:41:9: note: shadowed declaration is here
   41 |     rep(i, n) {
      |         ^
sorting.cpp:9:28: note: in definition of macro 'rep'
    9 | #define rep(i, n) for (int i = 0; i < int(n); ++i)
      |                            ^
sorting.cpp:52:17: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   52 |  return ans.size();
      |         ~~~~~~~~^~
sorting.cpp:34:39: warning: unused parameter 'M' [-Wunused-parameter]
   34 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                   ~~~~^
sorting.cpp:34:46: warning: unused parameter 'X' [-Wunused-parameter]
   34 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                          ~~~~^~~
sorting.cpp:34:55: warning: unused parameter 'Y' [-Wunused-parameter]
   34 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                                   ~~~~^~~

• Subtask 1: 8 / 8
• Subtask 2: 12 / 12
• Subtask 3: 0 / 16
• Subtask 4: 0 / 18
• Subtask 5: 0 / 20
• Subtask 6: 0 / 26