Submission #380669

#	Time	Username	Problem	Language	Result	Execution time	Memory
380669		ritul_kr_singh	Cave (IOI13_cave)	C++17	100 / 100	1153 ms	748 KiB

cave

#include "cave.h"

void exploreCave(int N){
	int ans[N], curr[N], D[N];
	for(int &i : ans) i = 2;

	for(int i=0; i<N; ++i){
		for(int j=0; j<N; ++j)
			curr[j] = ans[j]<2 ? ans[j] : 1;

		int currRes = tryCombination(curr);
		bool one = currRes>i or currRes<0;

		int low = 0, high = N-1;
		while(low<high){
			int mid = (low+high)/2;
			for(int j=0; j<N; ++j){
				if(ans[j]<2) curr[j] = ans[j];
				else if(j<=mid) curr[j] = one;
				else curr[j] = !one;
			}
			currRes = tryCombination(curr);
			if(currRes>i or currRes<0) high = mid;
			else low = mid+1;
		}
		ans[low] = one;
		D[low] = i;
	}
	answer(ans, D);
}

• Subtask 1: 12 / 12
• Subtask 2: 13 / 13
• Subtask 3: 21 / 21
• Subtask 4: 30 / 30
• Subtask 5: 24 / 24