Submission #67880

#	Time	Username	Problem	Language	Result	Execution time	Memory
67880		Good	parentrises (BOI18_parentrises)	C++11	50 / 100	181 ms	9300 KiB

parentrises

#include <bits/stdc++.h>
#include <ext/pb_ds/assoc_container.hpp>

#define ff first
#define ss second
#define Maxn 1000009
#define ll long long
#define pb push_back
#define Inf 1000000009
#define ppb() pop_back()
#define pii pair <int , int>
#define mid(x, y) (x + y) / 2
#define all(x) x.begin(),x.end()
#define llInf 1000000000000000009
#define tr(i, c) for(__typeof(c).begin() i = (c).begin() ; i != (c).end() ; i++)
using namespace std;
using namespace __gnu_pbds;
typedef tree <int, null_type, less <int>, rb_tree_tag, tree_order_statistics_node_update> order;

int P, T;

int main () {
	//freopen ("file.in", "r", stdin);
	//freopen ("file.out", "w", stdout);
	
 	//srand ((unsigned) time ( NULL ));
	//int randomNumber = rand() % 10 + 1;

	scanf ("%d%d", &P, &T);
	
	if (P == 1) {
		string s, s1;
		vector <pair <int, char> > v;
		
		for (int i = 1; i <= T; i++) {
			v.clear (), s1.clear(), s.clear();
			
			cin >> s;
			
			s1 = s;
			int sz = s.size();
			
			for (int j = 0; j < sz; j++) {
				if (s[j] == '(')
					v.pb ({j, '('});
				
				else {
					if (v.size() > 0 and v.back().ss == '(')
						s1[v.back().ff] = 'B', s1[j] = 'B', v.ppb ();
						
					else
						v.pb ({j, ')'});	
				}	
			}
			
			for (auto j: v) {
				if (j.ss == '(') {
					for (int k = j.ff + 1; k < sz; k++)	
						if (s[k] == ')' and s1[k] == 'B') {
							s1[k] = 'G', s1[j.ff] = 'R';
							break;
						}		
				}
				
				else {
					for (int k = j.ff - 1; k >= 0; k--) {
						if (s[k] == '(' and s1[k] == 'B') {
							s1[k] = 'G', s1[j.ff] = 'R';
							break;
						}
					}
					
				}
			}		 
			
			bool d = 0;
			for (int j = 0; j < sz; j++)
				if (s1[j] == '(' or s1[j] == ')') {
					d = 1;
					break;
				}
				
			if (d)
				puts ("impossible");
				
			else
				cout << s1 << '\n';
		}
	}	

	return 0;
}

Compilation message (stderr)

parentrises.cpp: In function 'int main()':
parentrises.cpp:29:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
  scanf ("%d%d", &P, &T);
  ~~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 5 / 5
• Subtask 2: 11 / 11
• Subtask 3: 6 / 6
• Subtask 4: 28 / 28
• Subtask 5: 0 / 6
• Subtask 6: 0 / 16
• Subtask 7: 0 / 28