oj.uz

답안 #68441

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
68441 2018-08-17T07:09:55 Z MrTEK 금 캐기 (IZhO14_divide) C++14
0 / 100
 7 ms 1108 KB 
#include <bits/stdc++.h>
 
using namespace std;
#define mp make_pair
#define pb push_back
#define len(a) (int)a.size()
#define fi first
#define sc second
#define cout maltahsin
#define left ind + ind
#define right ind + ind + 1
#define mid (l + r) / 2 
#define d1(w) cerr<<#w<<":"<<w<<endl;
#define d2(w,c) cerr<<#w<<":"<<w<<" "<<#c<<":"<<c<<endl;
#define d3(w,c,z) cerr<<#w<<":"<<w<<" "<<#c<<":"<<c<<" "<<#z<<":"<<z<<endl;
#define FAST_IO ios_base::sync_with_stdio(false);
#define endl '\n'
 
const int maxn = 620;
const long long LINF = 1e18;
const int LOG = 31;
const int INF = 1e9 + 5;
const int N = 1e5 + 5;
const int M = 1e5 + 5;
const int SQ = 350;
const int MOD = 998244353;
 
typedef pair <int,int> pii;

map <long long,int> mpx;

vector <pair <long long,int> > v;

int n,x[N],g[N],d[N],a[N],b[N],seg[N << 2];
long long ans,pred[N],preg[N];

void update(int ind,int l,int r,int w,int val) {
	if (l > w || r < w) return;
	if (l == w && r == w) {
		seg[ind] = min(seg[ind],val);
		return;
	}
	update(left,l,mid,w,val);
	update(right,mid + 1,r,w,val);
	seg[ind] = min(seg[left],seg[right]);
}

int get(int ind,int l,int r,int lw,int rw) {
	if (l > rw || r < lw) return 0;
	if (l >= lw && r <= rw) return seg[ind];
	return min(get(left,l,mid,lw,rw),get(right,mid + 1,r,lw,rw));
}


int main() {

	scanf("%d",&n);

	for (int i = 1 ; i <= n ; i++) {
		scanf("%d %d %d",&x[i],&g[i],&d[i]);
		pred[i] = pred[i - 1] + d[i];
		preg[i] = preg[i - 1] + g[i];
		v.pb(mp(pred[i] - x[i],i));
		v.pb(mp(pred[i - 1] - x[i],i));
	}

	sort(v.begin(),v.end());

	for (int i = 0, lst = 0; i < len(v) ; i++) {
		if (i == 0 || v[i - 1].fi != v[i].fi) lst++;
		if (b[v[i].sc]) a[v[i].sc] = lst;
		else b[v[i].sc] = lst;
	}

	// for (int i = 1 ; i <= n ; i++) d2(i,a[i]);
	// for (int i = 1 ; i <= n ; i++) d2(i,b[i]);

	for (int i = 1 ; i <= n ; i++) {
		int lst = -get(1,1,2 * n,1,a[i]);
		ans = max(ans,1ll * g[i]);
		// d2(i,lst);
		if (lst) ans = max(preg[i] - preg[lst - 1],ans);
		update(1,1,2 * n,b[i],-i);
	}
	printf("%lld\n",ans);

}

Compilation message

divide.cpp: In function 'int main()':
divide.cpp:57:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d",&n);
  ~~~~~^~~~~~~~~
divide.cpp:60:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d %d %d",&x[i],&g[i],&d[i]);
   ~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~

Subtask #1
0 / 17.0

# 결과 실행 시간 메모리 Grader output
1 Correct 2 ms 376 KB Output is correct
2 Incorrect 2 ms 376 KB Output isn't correct
3 Halted 0 ms 0 KB -

Subtask #2
0 / 31.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 2 ms 392 KB Output isn't correct
2 Halted 0 ms 0 KB -

Subtask #3
0 / 52.0

# 결과 실행 시간 메모리 Grader output
1 Incorrect 7 ms 1108 KB Output isn't correct
2 Halted 0 ms 0 KB -