Submission #1064246

#	Time	Username	Problem	Language	Result	Execution time	Memory
1064246		c2zi6	Distributing Candies (IOI21_candies)	C++17	3 / 100	70 ms	14492 KiB

candies

#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
#define ff first
#define ss second
#define pb push_back
#define all(a) (a).begin(), (a).end()
#define replr(i, a, b) for (int i = int(a); i <= int(b); ++i)
#define reprl(i, a, b) for (int i = int(a); i >= int(b); --i)
#define rep(i, n) for (int i = 0; i < int(n); ++i)
#define mkp(a, b) make_pair(a, b)
using namespace std;
typedef long long ll;
typedef long double ld;
typedef pair<int, int> PII;
typedef vector<int> VI;
typedef vector<PII> VPI;
typedef vector<VI> VVI;
typedef vector<VVI> VVVI;
typedef vector<VPI> VVPI;
typedef pair<ll, ll> PLL;
typedef vector<ll> VL;
typedef vector<PLL> VPL;
typedef vector<VL> VVL;
typedef vector<VVL> VVVL;
typedef vector<VPL> VVPL;
template<class T> T setmax(T& a, T b) {if (a < b) return a = b; return a;}
template<class T> T setmin(T& a, T b) {if (a < b) return a; return a = b;}
#include <ext/pb_ds/assoc_container.hpp>
using namespace __gnu_pbds;
template<class T>
using indset = tree<T, null_type, less<T>, rb_tree_tag, tree_order_statistics_node_update>;
#include "candies.h"

struct QUERY {
    int l, r, v;
};
typedef vector<QUERY> VQ;

namespace TEST1 {
    VI solve(VI c, VQ qrs) {
        int n = c.size();
        int q = qrs.size();
        VI a(n);
        for (auto[l, r, v] : qrs) {
            replr(i, l, r) {
                a[i] += v;
                setmin(a[i], c[i]);
                setmax(a[i], 0);
            }
        }
        return a;
    }
};
namespace TEST2 {
    bool check(VQ qrs) {
        for (auto[l, r, v] : qrs) if (v < 0) return false;
        return true;
    }
    VI solve(VI c, VQ qrs) {
        int n = c.size();
        int q = qrs.size();
        VL dif(n+1);
        for (auto[l, r, v] : qrs) {
            dif[l]++;
            dif[r+1]--;
        }
        replr(i, 1, n) dif[i] += dif[i-1];
        dif.pop_back();

        VI ans(n);
        rep(i, n) ans[i] = min(dif[i], 1ll*c[i]);
        return ans;
    }
};

VI distribute_candies(VI c, VI l, VI r, VI v) {
    int n = c.size();
    int q = l.size();
    VQ qrs;
    rep(i, q) qrs.pb({l[i], r[i], v[i]});
    if (n <= 2000 && q <= 2000) return TEST1::solve(c, qrs);
    if (TEST2::check(qrs)) return TEST2::solve(c, qrs);
    return VI();
}

Compilation message (stderr)

candies.cpp: In function 'VI TEST1::solve(VI, VQ)':
candies.cpp:42:13: warning: unused variable 'q' [-Wunused-variable]
   42 |         int q = qrs.size();
      |             ^
candies.cpp: In function 'VI TEST2::solve(VI, VQ)':
candies.cpp:61:13: warning: unused variable 'q' [-Wunused-variable]
   61 |         int q = qrs.size();
      |             ^

• Subtask 1: 3 / 3
• Subtask 2: 0 / 8
• Subtask 3: 0 / 27
• Subtask 4: 0 / 29
• Subtask 5: 0 / 33