Submission #212638

#TimeUsernameProblemLanguageResultExecution timeMemory
212638Aydarov03Arranging Shoes (IOI19_shoes)C++14
Compilation error
0 ms0 KiB
/* no pain, no gain */ #pragma GCC optimize ("Ofast") #pragma GCC target ("avx,avx2,fma") #include <bits/stdc++.h> #define fr first #define sc second #define pb push_back #define szof(s) (int)s.size() #define all(s) s.begin(), s.end() #define pii pair<int, int> #define all(s) s.begin(), s.end() #define prev myrza4321 #define y1 myrza1234 #define OK puts("OK") using namespace std; const int N = (int)1e5 + 5; const int INF = 0x3f3f3f3f; multiset <int> st[2][N]; int a[N]; /* 4 2 1 -1 -2 */ main() { int n; cin >> n; for (int i = 0; i < n; i++) { scanf("%d", &a[i]); } int ans = 0; for (int l = 0; l < n; l += 2) { int lst = -1; if (a[l] < 0) { lst = l + 1; } else { lst = l; } for (int r = l + 1; r < n; r++) { if (a[r] == -a[l]) { int pos = r; while (pos > lst) { swap(a[pos], a[pos - 1]); pos--, ans++; } break; } } } cout << ans; }

Compilation message (stderr)

shoes.cpp:31:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main() {
      ^
shoes.cpp: In function 'int main()':
shoes.cpp:36:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%d", &a[i]);
     ~~~~~^~~~~~~~~~~~~
/tmp/ccltPNn5.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/ccCAgLVD.o:shoes.cpp:(.text.startup+0x0): first defined here
/tmp/ccltPNn5.o: In function `main':
grader.cpp:(.text.startup+0x272): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status