Submission #1013149

#	Time	Username	Problem	Language	Result	Execution time	Memory
1013149		TrinhKhanhDung	Fuel Station (NOI20_fuelstation)	C++14	0 / 100	96 ms	9040 KiB

FuelStation

#include <bits/stdc++.h>
#define ll long long
#define fi first
#define se second
#define sz(x) (int)x.size()
#define ALL(v) v.begin(),v.end()
#define MASK(k) (1LL << (k))
#define BIT(x, i) (((x) >> (i)) & 1)
#define oo (ll)1e18
#define INF (ll)1e9
#define MOD (ll)(998244353)

using namespace std;

template<class T1, class T2>
    bool maximize(T1 &a, T2 b){if(a < b){a = b; return true;} return false;}

template<class T1, class T2>
    bool minimize(T1 &a, T2 b){if(a > b){a = b; return true;} return false;}

template<class T1, class T2>
    void add(T1 &a, T2 b){a += b; if(a >= MOD) a -= MOD;}

template<class T1, class T2>
    void sub(T1 &a, T2 b){a -= b; if(a < 0) a += MOD;}

template<class T>
    void cps(T &v){sort(ALL(v)); v.resize(unique(ALL(v)) - v.begin());}

const int MAX = 5e5 + 10;

int N, D;
tuple<int, int, int> a[MAX];

bool OK(int x){
    ll cur = x;
    for(int i=1; i<=N+1; i++){
        cur -= (get<0>(a[i]) - get<0>(a[i - 1]));
        if(cur < 0) return false;
        if(x <= get<2>(a[i])) maximize(cur, get<1>(a[i]));
    }
    return true;
}

void solve(){
    cin >> N >> D;
    for(int i=1; i<=N; i++){
        cin >> get<0>(a[i]) >> get<1>(a[i]) >> get<2>(a[i]);
    }
    sort(a + 1, a + N + 1);
    a[N + 1] = make_tuple(D, 0, 0);

    int l = 1, r = D;
    while(l < r){
        int m = (l + r) >> 1;
        if(OK(m)){
            r = m;
        }
        else{
            l = m + 1;
        }
    }
    cout << r << '\n';
}


int main(){
    ios_base::sync_with_stdio(0); cin.tie(0);
//    freopen("split.inp", "r", stdin);
//    freopen("split.out", "w", stdout);

    int tt = 1;
//    cin >> tt;

    while(tt--){
        solve();
    }

    return 0;
}

• Subtask 1: 0 / 7
• Subtask 2: 0 / 13
• Subtask 3: 0 / 17
• Subtask 4: 0 / 12
• Subtask 5: 0 / 19
• Subtask 6: 0 / 11
• Subtask 7: 0 / 21