oj.uz

답안 #149216

# 제출 시각 아이디 문제 언어 결과 실행 시간 메모리
149216 2019-09-01T05:59:07 Z 욱방켜!! (twitch.tv/wookje)(#3584, kig9981, cheetose, jh05013) HicCup (FXCUP4_hiccup) C++17
100 / 100
 935 ms 19428 KB 
#include "hiccup.h"
#include <stack>
#include <vector>
#include <iostream>
using namespace std;

bool try_to_pop(stack<pair<int,int>> &st, int X){
	// we want H_a C_b where a<=0 and b>=X
	if(st.size() < 2) return false;
	auto [b1, b2] = st.top(); st.pop();
	auto [a1, a2] = st.top(); st.pop();
	if(a1 != 1 || b1 != 2 || a2 > 0 || abs(b2) < X){
		st.push({a1,a2}); st.push({b1,b2});
		return false;
	}

	// combine ??(-a2) with !!(b2-X)
	int newex = -a2 + abs(b2)-X;
	if(st.empty()) st.push({0, -newex});
	else if(st.top().second > 0) st.top().second+= newex;
	else st.top().second-= newex;
	return true;
}

bool possible(vector<pair<int,int>> &V, int X){
	stack<pair<int,int>> st;
	for(auto [ct, ex]: V){
		st.push({ct,ex});
		while(try_to_pop(st, X));
	}
	if(st.empty()) return true;
	if(st.size() > 1) return false;
	return st.top().first == 0 && st.top().second <= 0;
}

int HicCup(std::string S) {
	int N = S.size();
	vector<pair<int,int>> V;
	// first: type. blank 0, H 1, C 2
	// second: !

	for(char c: S){
		if(c == '!'){
			if(V.empty()) V.push_back({0, 1});
			else V.back().second++;
		}
		else if(c == 'H') V.push_back({1, 0});
		else V.push_back({2, 0});
	}

	//for(auto [a,b]: V) cout<<a<<' '<<b<<endl;

	int lo = 0, hi = 1000000, ans = -1;
	while(lo <= hi){
		int mid = (lo+hi)/2;
		//cout<<"TRYING "<<mid<<endl;
		if(possible(V, mid)) ans = mid, lo = mid+1;
		else hi = mid-1;
	}
	if(ans > -1) return ans;
	return -1;
}

Compilation message

hiccup.cpp: In function 'int HicCup(std::__cxx11::string)':
hiccup.cpp:37:6: warning: unused variable 'N' [-Wunused-variable]
  int N = S.size();
      ^

Subtask #1
24.0 / 24.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 384 KB Output is correct
2 Correct 6 ms 384 KB Output is correct
3 Correct 8 ms 384 KB Output is correct
4 Correct 39 ms 1148 KB Output is correct
5 Correct 909 ms 19428 KB Output is correct
6 Correct 872 ms 19428 KB Output is correct
7 Correct 870 ms 19428 KB Output is correct
8 Correct 935 ms 19428 KB Output is correct
9 Correct 930 ms 19412 KB Output is correct
10 Correct 886 ms 19428 KB Output is correct
11 Correct 6 ms 384 KB Output is correct

Subtask #2
76.0 / 76.0

# 결과 실행 시간 메모리 Grader output
1 Correct 6 ms 384 KB Output is correct
2 Correct 6 ms 384 KB Output is correct
3 Correct 8 ms 384 KB Output is correct
4 Correct 39 ms 1148 KB Output is correct
5 Correct 909 ms 19428 KB Output is correct
6 Correct 872 ms 19428 KB Output is correct
7 Correct 870 ms 19428 KB Output is correct
8 Correct 935 ms 19428 KB Output is correct
9 Correct 930 ms 19412 KB Output is correct
10 Correct 886 ms 19428 KB Output is correct
11 Correct 624 ms 15444 KB Output is correct
12 Correct 171 ms 6504 KB Output is correct
13 Correct 18 ms 3328 KB Output is correct
14 Correct 6 ms 384 KB Output is correct
15 Correct 33 ms 3712 KB Output is correct
16 Correct 6 ms 384 KB Output is correct
17 Correct 5 ms 256 KB Output is correct
18 Correct 12 ms 768 KB Output is correct
19 Correct 21 ms 3456 KB Output is correct
20 Correct 36 ms 3712 KB Output is correct
21 Correct 17 ms 3328 KB Output is correct
22 Correct 16 ms 3200 KB Output is correct
23 Correct 16 ms 3144 KB Output is correct
24 Correct 49 ms 3964 KB Output is correct
25 Correct 658 ms 15700 KB Output is correct
26 Correct 181 ms 6376 KB Output is correct
27 Correct 17 ms 3328 KB Output is correct
28 Correct 15 ms 3072 KB Output is correct
29 Correct 16 ms 3200 KB Output is correct
30 Correct 5 ms 384 KB Output is correct
31 Correct 7 ms 384 KB Output is correct
32 Correct 6 ms 640 KB Output is correct
33 Correct 6 ms 384 KB Output is correct