Submission #851248

#	Time	Username	Problem	Language	Result	Execution time	Memory
851248		12345678	정렬하기 (IOI15_sorting)	C++17	20 / 100	1004 ms	15048 KiB

sorting

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

const int nx=2e3+5;
int dp[nx][nx], cnt(0);
vector<pair<int, int>> ans;

int findSwapPairs(int N, int S[], int M, int X[], int Y[], int P[], int Q[]) {
    for (int i=0; i<N; i++) dp[0][i]=S[i];
    bool f=1;
    for (int i=0; i<N; i++) if (S[i]!=i) f=0;
    if (f) return 0;
    for (int i=1; i<=N; i++)
    {
        for (int j=0; j<N; j++) dp[i][j]=dp[i-1][j];
        swap(dp[i][X[i-1]], dp[i][Y[i-1]]);
        ans.clear();
        vector<int> l(N);
        for (int j=0; j<N; j++) l[j]=dp[i][j];
        for (int j=0; j<N; j++) for (int k=j+1; k<N; k++) if (l[k]==j) ans.push_back({j, k}), swap(l[k], l[j]);
        if (ans.size()<=i) 
        {
            while (ans.size()<i) ans.push_back({0, 0});
            break;
        }
    }
	cnt=ans.size();
    for (int i=0; i<cnt; i++) P[i]=ans[i].first, Q[i]=ans[i].second;
    return cnt;
}

Compilation message (stderr)

sorting.cpp: In function 'int findSwapPairs(int, int*, int, int*, int*, int*, int*)':
sorting.cpp:23:23: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   23 |         if (ans.size()<=i)
      |             ~~~~~~~~~~^~~
sorting.cpp:25:30: warning: comparison of integer expressions of different signedness: 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   25 |             while (ans.size()<i) ans.push_back({0, 0});
      |                    ~~~~~~~~~~^~
sorting.cpp:29:14: warning: conversion from 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} to 'int' may change value [-Wconversion]
   29 |  cnt=ans.size();
      |      ~~~~~~~~^~
sorting.cpp:10:39: warning: unused parameter 'M' [-Wunused-parameter]
   10 | 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