Submission #988908

#	Time	Username	Problem	Language	Result	Execution time	Memory
988908		LilPluton	Prosjek (COCI14_prosjek)	C++14	50 / 50	1 ms	604 KiB

prosjek

#pragma GCC optimize("O3")
#include <bits/stdc++.h>
#define ll long long
#define OPT ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#define pii pair<int,int>
#define fi first
#define se second
#define int long long
#define vi vector<int>
#define all(a) a.begin(),a.end()
#define pb push_back
#define MAX(a,b,c) max(a,max(b,c))
#define MIN(a,b,c) min(a,min(b,c))
using namespace std;
void USACO(string filename){
  freopen((filename+".in").c_str(),"r",stdin);
  freopen((filename+".out").c_str(),"w",stdout);
}

struct BIT
{
    int n;
    vector<int> ft;
    void init(int N)
    {
        n = N + 5;
        ft.assign(n + 5, 0);
    }
    void add(int pos, int val)
    {
        for (pos = pos + 1; pos <= n; pos += pos & -pos) ft[pos] += val;
    }
    int get(int pos, int res = 0)
    {
        for (pos = pos + 1; pos > 0; pos -= pos & -pos) res += ft[pos];
        return res;
    }
};



struct DSU{
    vector<int>par;
    vector<int>sz;
    int n;
    DSU (int _n)
    {
        n = _n;
        par.resize(n + 1, 0);
        sz.resize(n + 1,1);
        for(int i = 1; i <= n; ++i)
            par[i] = i;
    }
    int _find(int v)
    {
        if(par[v] == v)
            return v;
        return par[v] = _find(par[v]);
    }
    void _union(int a, int b)
    {
        a = par[a];
        b = par[b];
        if(a != b)
        {
            if(sz[a] < sz[b])
                swap(a,b);
            par[b] = a;
            sz[a] += sz[b];
        }
    }
};


signed main()
{
    int n;
    cin >> n;
    vector<int>b(n),a(n), p(n);
    for(int i = 0; i < n; ++i)
    {
        cin >> b[i];
        if(i == 0)
        {
            a[i] = b[i];
            p[i] = a[i];
        }
        else
        {
            int s = b[i] * (i + 1);
            a[i] = s - p[i - 1];
            p[i] = p[i - 1] + a[i];
        }
    }
    for(int i : a)
        cout << i << ' ';
}

Compilation message (stderr)

prosjek.cpp: In function 'void USACO(std::string)':
prosjek.cpp:16:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   16 |   freopen((filename+".in").c_str(),"r",stdin);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
prosjek.cpp:17:10: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)' declared with attribute 'warn_unused_result' [-Wunused-result]
   17 |   freopen((filename+".out").c_str(),"w",stdout);
      |   ~~~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

• Subtask 1: 50 / 50