oj.uz

답안 #25309

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
25309 2017-06-21T06:27:52 Z kdh9949 Pinball (JOI14_pinball) C++14
100 / 100
 319 ms 21136 KB 
#include <bits/stdc++.h>
using namespace std;
typedef long long ll;

const ll inf = 1e18;
int n, m, s[100010], e[100010], x[100010], c[100010], xx[300010];
ll ans = inf;

int cp(int x){ return (int)(lower_bound(xx + 1, xx + 3 * m + 3, x) - xx); }

const int sz = 524288;
struct Seg{
	ll dat[2 * sz];
	void ini(){ fill(dat + 1, dat + 2 * sz, inf); }
	void upd(int x, ll v){
		x += sz - 1; dat[x] = min(dat[x], v);
		for(x /= 2; x; x /= 2) dat[x] = min(dat[2 * x], dat[2 * x + 1]);
	}
	ll get(int s, int e){
		ll ret = inf;
		for(s += sz - 1, e += sz - 1; s <= e; s /= 2, e /= 2){
			if(s % 2 == 1) ret = min(ret, dat[s++]);
			if(e % 2 == 0) ret = min(ret, dat[e--]);
		}
		return ret;
	}
} LS, RS;

int main(){
	scanf("%d%d", &m, &n);
	for(int i = 0; i < m; i++){
		scanf("%d%d%d%d", s + i, e + i, x + i, c + i);
		xx[3 * i + 1] = s[i];
		xx[3 * i + 2] = e[i];
		xx[3 * i + 3] = x[i];
	}
	xx[3 * m + 1] = 1;
	xx[3 * m + 2] = n;
	sort(xx + 1, xx + 3 * m + 3);
	LS.ini(); RS.ini();
	LS.upd(cp(1), 0); RS.upd(cp(n), 0);
	for(int i = 0; i < m; i++){
		s[i] = cp(s[i]); e[i] = cp(e[i]); x[i] = cp(x[i]);
		ll lv = LS.get(s[i], e[i]), rv = RS.get(s[i], e[i]);
		ans = min(ans, lv + rv + c[i]);
		LS.upd(x[i], lv + c[i]);
		RS.upd(x[i], rv + c[i]);
	}
	printf("%lld\n", ans > (inf / 10 * 9) ? -1 : ans);
}

Compilation message

pinball.cpp: In function 'int main()':
pinball.cpp:30:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf("%d%d", &m, &n);
                       ^
pinball.cpp:32:48: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
   scanf("%d%d%d%d", s + i, e + i, x + i, c + i);
                                                ^

Subtask #1
11.0 / 11.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 21136 KB Output is correct
2 Correct 3 ms 21136 KB Output is correct
3 Correct 0 ms 21136 KB Output is correct
4 Correct 6 ms 21136 KB Output is correct
5 Correct 0 ms 21136 KB Output is correct
6 Correct 0 ms 21136 KB Output is correct
7 Correct 0 ms 21136 KB Output is correct
8 Correct 6 ms 21136 KB Output is correct

Subtask #2
18.0 / 18.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 21136 KB Output is correct
2 Correct 6 ms 21136 KB Output is correct
3 Correct 3 ms 21136 KB Output is correct
4 Correct 0 ms 21136 KB Output is correct
5 Correct 3 ms 21136 KB Output is correct
6 Correct 9 ms 21136 KB Output is correct

Subtask #3
22.0 / 22.0

# 결과 실행 시간 메모리 Grader output
1 Correct 3 ms 21136 KB Output is correct
2 Correct 3 ms 21136 KB Output is correct
3 Correct 6 ms 21136 KB Output is correct
4 Correct 0 ms 21136 KB Output is correct
5 Correct 0 ms 21136 KB Output is correct
6 Correct 3 ms 21136 KB Output is correct
7 Correct 3 ms 21136 KB Output is correct
8 Correct 0 ms 21136 KB Output is correct
9 Correct 0 ms 21136 KB Output is correct
10 Correct 6 ms 21136 KB Output is correct

Subtask #4
49.0 / 49.0

# 결과 실행 시간 메모리 Grader output
1 Correct 26 ms 21136 KB Output is correct
2 Correct 63 ms 21136 KB Output is correct
3 Correct 183 ms 21136 KB Output is correct
4 Correct 253 ms 21136 KB Output is correct
5 Correct 129 ms 21136 KB Output is correct
6 Correct 273 ms 21136 KB Output is correct
7 Correct 316 ms 21136 KB Output is correct
8 Correct 319 ms 21136 KB Output is correct
9 Correct 33 ms 21136 KB Output is correct
10 Correct 119 ms 21136 KB Output is correct
11 Correct 143 ms 21136 KB Output is correct
12 Correct 293 ms 21136 KB Output is correct
13 Correct 239 ms 21136 KB Output is correct
14 Correct 233 ms 21136 KB Output is correct