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Submission #568418

# Submission time Handle Problem Language Result Execution time Memory
568418 2022-05-25T11:46:30 Z shahriarkhan Sirni (COCI17_sirni) C++14
84 / 140
 1763 ms 786432 KB 
#include<bits/stdc++.h>
using namespace std ;

const int MX = 2e7 + 5 ;

int nex[MX] , vis[MX] ;

vector<pair<int,int> > val[MX] ;

struct dsu
{
    vector<int> sz , par ;
    void init(int n)
    {
        sz = vector<int> (n+2,0) ;
        par = vector<int> (n+2,0) ;
        for(int i = 1 ; i <= n ; ++i)
        {
            par[i] = i , sz[i] = 1 ;
        }
    }
    int find_root(int a)
    {
        if(par[a]==a) return a ;
        return par[a] = find_root(par[a]) ;
    }
    int union_edge(int u , int v)
    {
        int root_u = find_root(u) , root_v = find_root(v) ;
        if(root_u==root_v) return 0 ;
        if(sz[root_v]>sz[root_u]) swap(root_u,root_v) ;
        sz[root_u] += sz[root_v] ;
        par[root_v] = root_u ;
        return 1 ;
    }
};

int main()
{
    int n ;
    scanf("%d",&n) ;
    int p[n+2] ;
    long long ans = 0 ;
    for(int i = 1 ; i <= n ; ++i)
    {
        scanf("%d",&p[i]) ;
        nex[p[i]] = p[i] ;
    }
    for(int i = MX - 3 ; i >= 0 ; --i)
    {
        if(!nex[i]) nex[i] = nex[i+1] ;
    }
    dsu D ;
    D.init(MX) ;
    for(int i = 1 ; i <= n ; ++i)
    {
        if(vis[p[i]]) continue ;
        vis[p[i]] = 1 ;
        for(int j = p[i] ; j < MX ; j += p[i])
        {
            if(!nex[j+(j==p[i])]) continue ;
            int rem = nex[j+(j==p[i])]%p[i] ;
            val[rem].push_back({p[i],nex[j+(j==p[i])]}) ;
        }
    }
    for(int i = 0 ; i < MX ; ++i)
    {
        for(pair<int,int> f : val[i])
        {
            int st = D.union_edge(f.first,f.second) ;
            if(st) ans += i ;
        }
    }
    printf("%lld\n",ans) ;
    return 0 ;
}

Compilation message

sirni.cpp: In function 'int main()':
sirni.cpp:41:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   41 |     scanf("%d",&n) ;
      |     ~~~~~^~~~~~~~~
sirni.cpp:46:14: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   46 |         scanf("%d",&p[i]) ;
      |         ~~~~~^~~~~~~~~~~~

Subtask #1
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 438 ms 708616 KB Output is correct
2 Correct 569 ms 739240 KB Output is correct
3 Correct 447 ms 709068 KB Output is correct

Subtask #2
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 546 ms 704932 KB Output is correct
2 Runtime error 628 ms 786432 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #3
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 436 ms 708832 KB Output is correct
2 Correct 439 ms 707304 KB Output is correct
3 Correct 426 ms 709012 KB Output is correct

Subtask #4
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 716 ms 718680 KB Output is correct
2 Correct 1305 ms 746408 KB Output is correct
3 Correct 799 ms 732248 KB Output is correct

Subtask #5
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 503 ms 710796 KB Output is correct
2 Correct 1132 ms 731996 KB Output is correct
3 Correct 856 ms 717236 KB Output is correct

Subtask #6
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 1022 ms 730524 KB Output is correct
2 Correct 1629 ms 765088 KB Output is correct
3 Correct 783 ms 727956 KB Output is correct

Subtask #7
14.0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 809 ms 709144 KB Output is correct
2 Correct 1763 ms 767224 KB Output is correct
3 Correct 794 ms 728988 KB Output is correct

Subtask #8
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 624 ms 758020 KB Output is correct
2 Runtime error 627 ms 786432 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #9
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 642 ms 761700 KB Output is correct
2 Runtime error 867 ms 786432 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -

Subtask #10
0 / 14.0

# Verdict Execution time Memory Grader output
1 Correct 474 ms 741332 KB Output is correct
2 Runtime error 1140 ms 786432 KB Execution killed with signal 9
3 Halted 0 ms 0 KB -