Submission #598847

#	Time	Username	Problem	Language	Result	Execution time	Memory
598847		MadokaMagicaFan	Art Collections (BOI22_art)	C++17	100 / 100	1671 ms	736 KiB

art

#include "bits/stdc++.h"

using namespace std;

using ll = long long;
using vi = vector<int>;
using pi = pair<int, int>;

#define forn(i,n)       for(int i = 0; i < n; ++i)
#define forr(i,n)       for(int i = n-1; i >= 0; --i)
#define forbe(i,b,e)    for(int i = b; i < e; ++i)

#define all(v)          (v).begin(),(v).end()
#define sort(v)         sort(all(v))
#define sz(v)           ((int)(v).size())

#define endl            '\n'

int publish(vi r);
void answer(vi r);

void solve (int n) {
    vi r(n);
    vi ans(n);

    int res, lres, fst;

    forn(i, n) {
        forn(j, n) {
            r[(n+j-i)%n] = j+1;
        }
        res = publish(r);
        if (!i) {
            fst = res;
            lres = res;
            continue;
        }

        ans[(lres-res+n-1)>>1] = i;
        lres = res;
    }

    res = fst;
    ans[(lres-res+n-1)>>1] = n;

    answer(ans);
}

#ifdef ONPC
int rn;
vi rs;
vi pl;

int publish(vi r) {
    int ret = 0;
    forbe(i,0,rn) 
        cout << r[i] << ' ';
    cout << endl;
    forbe(i,1,rn) {
        forn(j,i) {
            if (pl[r[i]-1] < pl[r[j]-1])
                ++ret;
        }
    }

    return ret;
}
void answer(vi r){
    forbe(i,0,rn) 
        cout << r[i] << ' ';
    forn(i, rn) {
        if (rs[i] != r[i]) {
            cout << "NO\n";
            return;
        }
    }
    cout << "YES\n";
}

void
rezolvare() {
    cin >> rn;
    rs.assign(rn,0);
    pl.assign(rn,0);

    forn(i,rn)
        cin >> rs[i];
    forn(i, rn)
        pl[rs[i]-1] = i;

    solve(rn);
}

int32_t
main(int argc, char** argv) {
    if (argc > 1)
        freopen(argv[1],"r", stdin);
    rezolvare();
}
#endif

Compilation message (stderr)

art.cpp: In function 'void solve(int)':
art.cpp:44:14: warning: 'fst' may be used uninitialized in this function [-Wmaybe-uninitialized]
   44 |     ans[(lres-res+n-1)>>1] = n;
      |          ~~~~^~~~
art.cpp:44:14: warning: 'lres' may be used uninitialized in this function [-Wmaybe-uninitialized]
interface.cpp: In function 'int publish(std::vector<int>)':
interface.cpp:20:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   20 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~
interface.cpp: In function 'void answer(std::vector<int>)':
interface.cpp:36:17: warning: comparison of integer expressions of different signedness: 'std::vector<int>::size_type' {aka 'long unsigned int'} and 'int' [-Wsign-compare]
   36 |     if(v.size() != N) {
      |        ~~~~~~~~~^~~~

• Subtask 1: 5 / 5
• Subtask 2: 15 / 15
• Subtask 3: 15 / 15
• Subtask 4: 15 / 15
• Subtask 5: 20 / 20
• Subtask 6: 30 / 30