Submission #147711

#	Time	Username	Problem	Language	Result	Execution time	Memory
147711		Ruxandra985	Sirni (COCI17_sirni)	C++14	98 / 140	5096 ms	412712 KiB

sirni

/// alta mini bulaneala :)
#include <cstdio>
#include <algorithm>
#define DIM 100010
using namespace std;
int v[DIM];
pair <int,pair <int,int> > m[40000000];
int tt[DIM];
int biggest[10000010];
int fth ( int x ){
    int aux;
    int init = x;
    while (tt[x]>=0){
        x = tt[x];
    }
    while (tt[init]>=0){
        aux = tt[init];
        tt[init] = x;
        init = aux;
    }

    return x;
}
int main()
{
   // freopen ("a.in" , "r" , stdin);
   // freopen ("a.out" , "w" , stdout);
    int n,i,elem,p,mch,j,x,y,tx,ty;
    long long sol=0;
    scanf ("%d",&n);
    for (i=1;i<=n;i++){
        scanf ("%d",&v[i]);
    }
    sort (v+1,v+n+1);
    elem = 0;
    for (i=1;i<=n;i++){
        if (i==1 || v[i]!=v[i-1])
            v[++elem] = v[i];
    }
    n = elem;
    p=n;
    for (i=v[n];i;i--){
        if (p && v[p] == i){
            biggest[i] = p;
            p--;
        }
        else biggest[i] = biggest[i+1];
    }
    mch=0;
    for (i=1;i<=n;i++){
        if (i!=n && v[i+1]/v[i] == 1 && v[i+1] % v[i]<=50000){
            mch++;
            m[mch].first = v[i+1] % v[i];
            m[mch].second.first = i;
            m[mch].second.second = i+1;
        }
        for (j=2*v[i];j<=v[n];j+=v[i]){
            /// cea mai mica val mai mare decat j
            x = biggest[j];
            if (j/v[i] == v[x]/v[i] && v[x] % v[i]<=50000){ /// add muchie
                mch++;
                m[mch].first = v[x] % v[i];
                m[mch].second.first = i;
                m[mch].second.second = x;
            }
        }
    }
    for (i=1;i<=n;i++)
        tt[i] = -1;
    sort (m+1,m + mch + 1);
    int pus = 0;
    for (i=1;i<=mch && pus!=n-1;i++){
        x = m[i].second.first;
        y = m[i].second.second;
        tx = fth(x);
        ty = fth(y);
        if (tx!=ty){
            sol+=m[i].first;
            pus++;
            //printf ("%d ",m[i].first);
            if (tt[tx] < tt[ty]){
                tt[tx]+=tt[ty];
                tt[ty] = tx;
            }
            else {
                tt[ty]+=tt[tx];
                tt[tx] = ty;
            }
        }
    }
    printf ("%lld",sol);
    return 0;
}

Compilation message (stderr)

sirni.cpp: In function 'int main()':
sirni.cpp:30:11: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf ("%d",&n);
     ~~~~~~^~~~~~~~~
sirni.cpp:32:15: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf ("%d",&v[i]);
         ~~~~~~^~~~~~~~~~~~

• Subtask 1: 14 / 14
• Subtask 2: 14 / 14
• Subtask 3: 14 / 14
• Subtask 4: 14 / 14
• Subtask 5: 14 / 14
• Subtask 6: 14 / 14
• Subtask 7: 14 / 14
• Subtask 8: 0 / 14
• Subtask 9: 0 / 14
• Subtask 10: 0 / 14