Submission #834353

#	Time	Username	Problem	Language	Result	Execution time	Memory
834353		TB_	Sorting (IOI15_sorting)	C++17	20 / 100	1 ms	340 KiB

sorting

#include <bits/stdc++.h>
using namespace std;

#define ll long long
#define INF (ll)1e9+7
#define fo(i, x) for(ll i = 0; i<x;i++)
#define pb push_back
#define deb(x) cout << #x << " = " << x << endl;
#define deb2(x, y) cout << #x << " = " << x << ", "  << #y << " = " << y << endl;

typedef vector<ll> vl;
vl v;

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    P[0] = 0;
	Q[0] = 0;
	v.resize(N);
	fo(i, N) v[S[i]] = i;
	ll ans = 0;
	fo(i, N){
		if(S[i] == i) continue;
		v[S[i]] = v[i];
		swap(S[i], S[v[i]]);
		P[ans] = i;
		Q[ans] = v[i];
		ans++;
	}
	return ans;
}


// static char _buffer[1024];
// static int _currentChar = 0;
// static int _charsNumber = 0;
// static FILE *_inputFile, *_outputFile;

// static inline int _read() {
//     if (_charsNumber < 0) {
//         exit(1);
//     }
//     if (!_charsNumber || _currentChar == _charsNumber) {
//         _charsNumber = (int)fread(_buffer, sizeof(_buffer[0]), sizeof(_buffer), _inputFile);
//         _currentChar = 0;
//     }
//     if (_charsNumber <= 0) {
//         return -1;
//     }
//     return _buffer[_currentChar++];
// }

// static inline int _readInt() {
//     int c, x, s;
//     c = _read();
//     while (c <= 32) c = _read();
//     x = 0;
//     s = 1;
//     if (c == '-') {
//         s = -1;
//         c = _read();
//     }
//     while (c > 32) {
//         x *= 10;
//         x += c - '0';
//         c = _read();
//     }
//     if (s < 0) x = -x;
//     return x;
// }


// int main()
// {
// 	_inputFile = fopen("sorting.in", "rb");
// 	_outputFile = fopen("sorting.out", "w");
// 	int N, M;
// 	N = _readInt();
// 	int *S = (int*)malloc(sizeof(int) * (unsigned int)N);
// 	for (int i = 0; i < N; ++i)
// 		S[i] = _readInt();
// 	M = _readInt();
// 	int *X = (int*)malloc(sizeof(int) * (unsigned int)M), *Y = (int*)malloc(sizeof(int) * (unsigned int)M);
// 	for (int i = 0; i < M; ++i) {
// 	    X[i] = _readInt();
// 	    Y[i] = _readInt();
// 	}
// 	int *P = (int*)malloc(sizeof(int) * (unsigned int)M), *Q = (int*)malloc(sizeof(int) * (unsigned int)M);
// 	int ans = findSwapPairs(N, S, M, X, Y, P, Q);
// 	fprintf(_outputFile, "%d\n", ans);
// 	for (int i = 0; i < ans; ++i)
// 		fprintf(_outputFile, "%d %d\n", P[i], Q[i]);
// 	return 0;
// }

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:24:12: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   24 |   P[ans] = i;
      |            ^
sorting.cpp:25:15: warning: conversion from '__gnu_cxx::__alloc_traits<std::allocator<long long int>, long long int>::value_type' {aka 'long long int'} to 'int' may change value [-Wconversion]
   25 |   Q[ans] = v[i];
      |               ^
sorting.cpp:28:9: warning: conversion from 'long long int' to 'int' may change value [-Wconversion]
   28 |  return ans;
      |         ^~~
sorting.cpp:14:39: warning: unused parameter 'M' [-Wunused-parameter]
   14 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                   ~~~~^
sorting.cpp:14:46: warning: unused parameter 'X' [-Wunused-parameter]
   14 | int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
      |                                          ~~~~^~~
sorting.cpp:14:55: warning: unused parameter 'Y' [-Wunused-parameter]
   14 | 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