Submission #670546

#	Time	Username	Problem	Language	Result	Execution time	Memory
670546		birthdaycake	Arranging Shoes (IOI19_shoes)	C++17	Compilation error	0 ms	0 KiB

shoes

long long vs[1001];
long long count_swaps(vector<int>s) {
    long long n = s.size(); long long ans = 0;
    for(long long i = 0; i < n; i++){
        long long f = 0;
        for(long long j = 0; j < i; j++){
            if(!vs[j] && s[i] == -s[j]){
                f = j + 1;
                break;
            }
        }
        if(f){
            f--;
            vs[f] = 1;
            vs[f + 1] = 1;
            if(s[f] < 0) ans += (i - f - 1);
            else ans += (i - f);
            while(i != f + 1){
                swap(s[i], s[i - 1]);
                i--;
            }
            if(s[f] > 0) swap(s[f], s[f + 1]);
        }
        
    }
    
    return ans;
}

Compilation message (stderr)

shoes.cpp:2:23: error: 'vector' was not declared in this scope
    2 | long long count_swaps(vector<int>s) {
      |                       ^~~~~~
shoes.cpp:2:30: error: expected primary-expression before 'int'
    2 | long long count_swaps(vector<int>s) {
      |                              ^~~