답안 #269840

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
269840	2020-08-17T10:45:32 Z	kaplanbar	Go (COCI18_go)	C++17	80 / 100	3 ms	3584 KB

go

#include <bits/stdc++.h>
using namespace std;
using ll = long long;
struct Pk {
    ll a, b, t;
    bool operator<(const Pk other) const {
        return a < other.a;
    }
};
ll n, k, m, sz1, sz2, dp[105][2005], dp2[105][2005];
Pk v1[105],v2[105];
ll f(int idx, int T) {
    if(idx>=sz1) return 0;
    if(~dp[idx][T]) return dp[idx][T];
    ll ret=0;
    if(T<v1[idx].t) ret+=v1[idx].b;
    if(idx!=sz1-1) {
        ret+=f(idx+1,T+abs(v1[idx+1].a-v1[idx].a));
    }
    return dp[idx][T]=ret;
}
ll f2(int idx, int T) {
    if(idx>=sz2) return 0;
    if(~dp2[idx][T]) return dp2[idx][T];
    ll ret=0;
    if(T<v2[idx].t) ret+=v2[idx].b;
    if(idx!=sz2-1) {
        ret+=f2(idx+1,T+abs(v2[idx+1].a-v2[idx].a));
    }
    return dp2[idx][T]=ret;
}
int main() {
    ios_base::sync_with_stdio(false);
    cin.tie(0);
    memset(dp,-1,sizeof dp);
    memset(dp2,-1,sizeof dp2);
    cin >> n >> k >> m;
    for(int i = 0; i < m; i++) {
        int a, b, t;
        cin >> a >> b >> t;
        if(a>k) v1[sz1++]={a,b,t};
        else v2[sz2++]={a,b,t};
    }
    sort(v1, v1+sz1);
    
    sort(v2, v2+sz2);
    reverse(v2, v2+sz2);

    ll ans = sz1 ? f(0,v1[0].a-k) : 0;

    ll ans2 = sz2 ? f2(0, k-v2[0].a) : 0;

    ll sum = 0;

    for(int i = 0; i < sz2; i++) {
        if(v2[i].t > k - v2[i].a) {
            sum += v2[i].b;
        }
        ll r = sz1 ? f(0, k - v2[i].a + v1[0].a - v2[i].a) : 0ll;
        ans = max(ans, sum + r);
    }

    sum = 0;

    for(int i = 0; i < sz1; i++) {
        if(v1[i].t > v1[i].a - k) {
            sum += v1[i].b;
        }
        ll r = sz2 ? f2(0, v1[i].a - k + v1[i].a - v2[0].a) : 0ll;
        ans2 = max(ans2, sum + r);
    }

    cout << max(ans, ans2);

    return 0;
}

Subtask #1

80.0 / 100.0

#	결과	실행 시간	메모리	Grader output
1	Correct	3 ms	3584 KB	Output is correct
2	Correct	2 ms	3584 KB	Output is correct
3	Correct	2 ms	3584 KB	Output is correct
4	Correct	2 ms	3584 KB	Output is correct
5	Correct	3 ms	3584 KB	Output is correct
6	Correct	2 ms	3584 KB	Output is correct
7	Incorrect	2 ms	3584 KB	Output isn't correct
8	Correct	3 ms	3584 KB	Output is correct
9	Correct	2 ms	3584 KB	Output is correct
10	Incorrect	3 ms	3584 KB	Output isn't correct