Submission #987606

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
987606	2024-05-23 07:06:50	Otalp	Permutation (APIO22_perm)	C++17	100 / 100	49 ms	856 KiB

perm

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#include "perm.h"
#include<bits/stdc++.h>
using namespace std;
#define ll long long
#define pb push_back
ll pref[200][200], suf[200][200];
ll a[200100];
ll n;
void calc(){
    for(int x=0; x<=n + 1; x++) pref[0][x] = 1;
    for(int i=1; i<=n; i++){
        for(int x=0; x<=n + 1; x++){
            pref[i][x] = pref[i - 1][x];
            if(a[i] <= x){
                pref[i][x] += pref[i-1][a[i]];
            }
        }
    }
    for(int x=0; x<=n + 1; x++) suf[n + 1][x] = 1;
    for(int i=n; i>=1; i--){
        for(int x=n + 1; x>=0; x--){
            suf[i][x] = suf[i + 1][x];
            if(a[i] >= x){
                suf[i][x] += suf[i + 1][a[i]];    
            }
        }
 
 
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Compilation message (stderr)

perm.cpp: In function 'std::vector<int> construct_permutation(long long int)':
perm.cpp:41:12: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
   41 |         ll pos, x;
      |            ^~~

• Subtask 1: 10 / 10
• Subtask 2: 90 / 90