oj.uz

Submission #151832

# Submission time Handle Problem Language Result Execution time Memory
151832 2019-09-05T04:47:20 Z SorahISA Gap (APIO16_gap) C++14
100 / 100
 76 ms 3448 KB 
#ifndef LOCAL
#include "gap.h"
#endif

#include <bits/stdc++.h>
using namespace std;

#ifdef LOCAL

long long t, n;
vector<long long> vcL;

void MinMax(long long a, long long b, long long &mn, long long &mx) {
	cout << "MinMax(" << a << ", " << b << "): ";
	bool MN = false, MX = false;
	for (int i = 0; i < n; ++i) {
		if (!MN and vcL[i] >= a and vcL[i] <= b) {
			mn = vcL[i];
			MN = true;
		}
		if (!MX and vcL[n - i - 1] <= b and vcL[n - i - 1] >= a) {
			mx = vcL[n - i - 1];
			MX = true;
		}
		if (MN and MX) {
			break;
		}
	}
	
	if (!MN or !MX) {
		mn = -1;
		mx = -1;
	}
	
	cout << "mn = " << mn << ", mx = " << mx << '\n';
	return;
}

#endif

const int maxn = 1E5 + 5;
vector<long long> num(maxn, -1);
long long mn, mx, cnt = 0;

long long findGap1(int N) {
	mn = -1;
	mx = (long long)1E18 + 2;
	
	for (int i = 0; i < (N+1)/2; ++i) {
		#ifdef LOCAL
		MinMax(mn + 1, mx - 1, mn, mx);
		#else
		MinMax(mn + 1, mx - 1, &mn, &mx);
		#endif
		
		num[i] = mn;
		num[N - i - 1] = mx;
		
		if (mn == -1 and mx == -1) assert(false);
		else if (mn == mx) break;
	}
	
	long long answer = 0;
	for (int i = 1; i < N; ++i) {
		answer = max(answer, num[i] - num[i - 1]);
	}
	
	return answer;
}

/*
void recur(long long lo, long long hi, long long &mn, long long &mx) {
	#ifdef LOCAL
	MinMax(lo, hi, mn, mx);
	#else
	MinMax(lo, hi, &mn, &mx);
	#endif
	
	if (mx == mn + 1) {
		num[cnt++] = mn;
		num[cnt++] = mx;
	}
	else if (mn != mx and mx != -1) {
		long long mi = (mn + mx) >> 1;
		long long tmpMN = mn, tmpMX = mx;
		recur(tmpMN, mi, mn, mx);
		recur(mi + 1, tmpMX, mn, mx);
	}
	else if (mn == mx and mx != -1) {
		num[cnt++] = mn;
	}
}
*/

long long findGap2(int N) {
	// recur(0, (long long)1E18, mn, mx);
	#ifdef LOCAL
	MinMax(0, (long long)1E18, mn, mx);
	#else
	MinMax(0, (long long)1E18, &mn, &mx);
	#endif
	
	long long LO = mn, HI = mx;
	num.assign(1, mn);
	
	long long block[N][2];
	block[0][1] = LO;
	for (int i = 1; i < N; ++i) {
		block[i][0] = block[i - 1][1] + 1;
		block[i][1] = block[i][0] + (HI - LO) / (N - 1) - ((HI - LO) % (N - 1) <= i);
		#ifdef LOCAL
		cout << block[i][0] << ' ' << block[i][1] << '\n';
		#endif
	}
	
	for (int i = 1; i < N; ++i) {
		#ifdef LOCAL
		MinMax(block[i][0], block[i][1], mn, mx);
		#else
		MinMax(block[i][0], block[i][1], &mn, &mx);
		#endif
		
		if (mn == mx and mn != -1) {
			num.push_back(mn);
		}
		else if (mn != mx) {
			num.push_back(mn);
			num.push_back(mx);
		}
	}
	
	num.push_back(HI);
	
	long long answer = 0;
	int sz = num.size();
	for (int i = 1; i < sz; ++i) {
		answer = max(answer, num[i] - num[i - 1]);
	}
	
	return answer;
}

long long findGap(int T, int N) {
	if (T == 1) return findGap1(N);
	else 	    return findGap2(N);
}

#ifdef LOCAL

int main() {
	long long ANSWER = 0;
	cin >> t >> n;
	
	vcL.assign(n, 0);
	for (int i = 0; i < n; ++i) {
		cin >> vcL[i];
		if (i) ANSWER = max(ANSWER, vcL[i] - vcL[i - 1]);
	}
	
	long long myAns = findGap(t, n);
	cout << "Your answer: " << myAns << '\n';
	cout << "Real answer: " << ANSWER << '\n';
	return 0;
}

#endif

Subtask #1
30.0 / 30.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1148 KB Output is correct
2 Correct 3 ms 1144 KB Output is correct
3 Correct 3 ms 1192 KB Output is correct
4 Correct 3 ms 1144 KB Output is correct
5 Correct 3 ms 1148 KB Output is correct
6 Correct 3 ms 1144 KB Output is correct
7 Correct 3 ms 1144 KB Output is correct
8 Correct 3 ms 1144 KB Output is correct
9 Correct 3 ms 1144 KB Output is correct
10 Correct 2 ms 1144 KB Output is correct
11 Correct 3 ms 1272 KB Output is correct
12 Correct 3 ms 1148 KB Output is correct
13 Correct 3 ms 1144 KB Output is correct
14 Correct 3 ms 1144 KB Output is correct
15 Correct 3 ms 1144 KB Output is correct
16 Correct 16 ms 1400 KB Output is correct
17 Correct 16 ms 1400 KB Output is correct
18 Correct 16 ms 1272 KB Output is correct
19 Correct 15 ms 1276 KB Output is correct
20 Correct 12 ms 1400 KB Output is correct
21 Correct 54 ms 1912 KB Output is correct
22 Correct 55 ms 1912 KB Output is correct
23 Correct 56 ms 1940 KB Output is correct
24 Correct 55 ms 2040 KB Output is correct
25 Correct 47 ms 1884 KB Output is correct
26 Correct 56 ms 1912 KB Output is correct
27 Correct 55 ms 1912 KB Output is correct
28 Correct 55 ms 1912 KB Output is correct
29 Correct 54 ms 1912 KB Output is correct
30 Correct 41 ms 1916 KB Output is correct
31 Correct 3 ms 1144 KB Output is correct
32 Correct 3 ms 1144 KB Output is correct

Subtask #2
70.0 / 70.0

# Verdict Execution time Memory Grader output
1 Correct 3 ms 1144 KB Output is correct
2 Correct 3 ms 1144 KB Output is correct
3 Correct 3 ms 1144 KB Output is correct
4 Correct 3 ms 1144 KB Output is correct
5 Correct 3 ms 1144 KB Output is correct
6 Correct 3 ms 1144 KB Output is correct
7 Correct 3 ms 1144 KB Output is correct
8 Correct 3 ms 1144 KB Output is correct
9 Correct 3 ms 1148 KB Output is correct
10 Correct 3 ms 1116 KB Output is correct
11 Correct 4 ms 1144 KB Output is correct
12 Correct 4 ms 1144 KB Output is correct
13 Correct 4 ms 1144 KB Output is correct
14 Correct 4 ms 1144 KB Output is correct
15 Correct 4 ms 1144 KB Output is correct
16 Correct 20 ms 1656 KB Output is correct
17 Correct 20 ms 1656 KB Output is correct
18 Correct 20 ms 1656 KB Output is correct
19 Correct 20 ms 1656 KB Output is correct
20 Correct 11 ms 1784 KB Output is correct
21 Correct 75 ms 3448 KB Output is correct
22 Correct 75 ms 3448 KB Output is correct
23 Correct 74 ms 3448 KB Output is correct
24 Correct 76 ms 3448 KB Output is correct
25 Correct 69 ms 3448 KB Output is correct
26 Correct 75 ms 3448 KB Output is correct
27 Correct 74 ms 3448 KB Output is correct
28 Correct 75 ms 3448 KB Output is correct
29 Correct 75 ms 3448 KB Output is correct
30 Correct 40 ms 3448 KB Output is correct
31 Correct 3 ms 1144 KB Output is correct
32 Correct 3 ms 1144 KB Output is correct