Submission #314190

#	Time	Username	Problem	Language	Result	Execution time	Memory
314190		ShiftyBlock	Arranging Shoes (IOI19_shoes)	C++14	Compilation error	0 ms	0 KiB

shoes

#include <bits/stdc++.h>
using namespace std;
#define f first
#define s second
#define pii pair<int, int>
#define long long long
#define v vector
#define rep(i,a,b) for(int i=a; i<b; i++)
void setIO(string name, int submit) {
    if (submit) {
        ios_base::sync_with_stdio(0);
        cin.tie(0);
        freopen((name + ".in").c_str(), "r", stdin);
        freopen((name + ".out").c_str(), "w", stdout);
    }
    else{
        ios_base::sync_with_stdio(0);
        cin.tie(0);
    }
    
}
int N;
int main() {
    setIO("", 0);
    cin>>N;
   	int arr[N];
    for (int i = 0; i < N; ++i)
    {cin>>arr[i]; }
    int total=0;
    for (int i = 0; i < N; ++i)
    {
    	if(arr[i]==0) continue;
    	int free=0;
    	int end=-1;
    	rep(j,i+1,N){
    		if(arr[j]==-arr[i]){
    			end=j; break;
    		}
    		if(arr[j]==0) free++;
    	}	
    	arr[end]=0;
    	if(arr[i]<0) total--;
    	total+=end-i;
    }
    cout<<total<<endl;

    return 0;
}

Compilation message (stderr)

shoes.cpp: In function 'void setIO(std::string, int)':
shoes.cpp:13:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   13 |         freopen((name + ".in").c_str(), "r", stdin);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
shoes.cpp:14:16: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result]
   14 |         freopen((name + ".out").c_str(), "w", stdout);
      |         ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/tmp/ccBSSh9D.o: In function `main':
grader.cpp:(.text.startup+0x0): multiple definition of `main'
/tmp/cc2vIJmj.o:shoes.cpp:(.text.startup+0x0): first defined here
/tmp/ccBSSh9D.o: In function `main':
grader.cpp:(.text.startup+0x26a): undefined reference to `count_swaps(std::vector<int, std::allocator<int> >)'
collect2: error: ld returned 1 exit status