10327 - Flip sort/10327.cpp

   1 /*
   2   Problem: 10327 - Flip sort (UVa)
   3   Author: Andrés Mejía-Posada
   4   (http://blogaritmo.factorcomun.org)
   5
   6 */
   7
   8 using namespace std;
   9 #include <algorithm>
  10 #include <iostream>
  11 #include <iterator>
  12 #include <sstream>
  13 #include <fstream>
  14 #include <cassert>
  15 #include <climits>
  16 #include <cstdlib>
  17 #include <cstring>
  18 #include <string>
  19 #include <cstdio>
  20 #include <vector>
  21 #include <cmath>
  22 #include <queue>
  23 #include <deque>
  24 #include <stack>
  25 #include <map>
  26 #include <set>
  27
  28 #define D(x) cout << #x " is " << x << endl
  29
  30 const int N = 1000;
  31 int a[N];
  32
  33 void randomTestCase(){
  34   int n = 1000;
  35   printf("%d\n", n);
  36   for (int i=0; i<n; ++i){
  37     printf("%s%d", i ? " " : "", random() % (1<<10));
  38   }
  39   printf("\n");
  40   exit(0);
  41 }
  42
  43
  44 int main(){
  45   //randomTestCase();
  46
  47   for (int n; scanf("%d", &n) == 1; ){
  48     for (int i=0; i<n; ++i){
  49       scanf("%d", a+i);
  50     }
  51     int ans = 0;
  52     for (int i=0; i<n; ++i){
  53       for (int j=i+1; j<n; ++j){
  54         ans += a[i] > a[j];
  55       }
  56     }
  57     printf("Minimum exchange operations : %d\n", ans);
  58
  59   }
  60   return 0;
  61 }