Submission #413369

#	Time	Username	Problem	Language	Result	Execution time	Memory
413369		ocarima	Group Photo (JOI21_ho_t3)	C++14	44 / 100	5058 ms	332 KiB

Main

#include<bits/stdc++.h>

using namespace std;

#define fastio ios_base::sync_with_stdio(false); cin.tie(NULL)
#define lli long long int
#define vi vector<int>
#define vlli vector<long long int>
#define pii pair<int, int>
#define plli pair<lli, lli>
#define rep(i, a, b) for(lli i = (a); i <= (b); i++)
#define repa(i, a, b) for(lli i = (a); i >= (b); i--)
#define repv(x, v) for(auto x : v)
#define debug(x) cout << #x << " = " << x << endl
#define debugsl(x) cout << #x << " = " << x << ", "
#define debugarr(x, a, b) cout << #x << " = ["; rep(ii, a, b) cout << x[ii] << ", "; cout << "]\n"
#define pb push_back
#define nl "\n"

#define MAX_N 5002
#define INF (1ll << 62)


lli n, h[MAX_N], dp[MAX_N];

lli costo(lli l, lli r){
    vlli tmp;
    lli pos, cnt, offset;

    rep(i, 1, n) if (h[i] >= l) tmp.pb(h[i]);
    cnt = offset = 0;
    repa(i, r, l){
        rep(j, 0, tmp.size() - 1) if (tmp[j] == i){ pos = j; break; }
        repa(j, pos, offset + 1){
            swap(tmp[j], tmp[j - 1]);
            ++cnt;
        }
        ++offset;
    }
    return cnt;
}

int main()
{
    fastio;

    cin >> n;
    rep(i, 1, n) cin >> h[i];

    rep(i, 1, n){
        dp[i] = INF;
        rep(j, 0, i - 1){
            dp[i] = min(dp[i], dp[j] + costo(j + 1, i));
        }
    }

    cout << dp[n];

    return 0;
}

Compilation message (stderr)

Main.cpp: In function 'long long int costo(long long int, long long int)':
Main.cpp:11:41: warning: comparison of integer expressions of different signedness: 'long long int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 | #define rep(i, a, b) for(lli i = (a); i <= (b); i++)
      |                                         ^
Main.cpp:33:9: note: in expansion of macro 'rep'
   33 |         rep(j, 0, tmp.size() - 1) if (tmp[j] == i){ pos = j; break; }
      |         ^~~
Main.cpp:35:23: warning: 'pos' may be used uninitialized in this function [-Wmaybe-uninitialized]
   35 |             swap(tmp[j], tmp[j - 1]);
      |                       ^

• Subtask 1: 5 / 5
• Subtask 2: 7 / 7
• Subtask 3: 32 / 32
• Subtask 4: 0 / 20
• Subtask 5: 0 / 36