Submission #67659662

---

Source Code Expand

//#pragma GCC optimize("Ofast")
//#pragma GCC target("avx,avx2,fma")
//#pragma GCC target("sse,sse2,sse3,ssse3,sse4.1,sse4.2,sse4a,avx,avx2,popcnt,tune=native")
#include <iostream>
#include <cstdio>
#include <cstdlib>
#include <algorithm>
#include <cmath>
#include <vector>
#include <set>
#include <map>
#include <unordered_set>
#include <unordered_map>
#include <queue>
#include <ctime>
#include <cassert>
#include <complex>
#include <string>
#include <cstring>
#include <chrono>
#include <random>
#include <bitset>
#include <array>
#include <climits>
using namespace std;

#ifdef LOCAL
	#define eprintf(...) {fprintf(stderr, __VA_ARGS__);fflush(stderr);}
#else
	#define eprintf(...) 42
#endif

using ll = long long;
using ld = long double;
using uint = unsigned int;
using ull = unsigned long long;
using pii = pair<int, int>;
using pli = pair<ll, int>;
using pll = pair<ll, ll>;
mt19937_64 rng(chrono::steady_clock::now().time_since_epoch().count());
ll myRand(ll B) {
	return (ull)rng() % B;
}

#define mp make_pair
#define all(x) (x).begin(),(x).end()

clock_t startTime;
double getCurrentTime() {
	return (double)(clock() - startTime) / CLOCKS_PER_SEC;
}

ll floor_div(ll x, ll y) {
	assert(y != 0);
	if (y < 0) {
		y = -y;
		x = -x;
	}
	if (x >= 0) return x / y;
	return (x + 1) / y - 1;
}
ll ceil_div(ll x, ll y) {
	assert(y != 0);
	if (y < 0) {
		y = -y;
		x = -x;
	}
	if (x <= 0) return x / y;
	return (x - 1) / y + 1;
}
template<typename T>
T sqr(T x) {
	return x * x;
}

const ll INF = (ll)1e15;
const int N = 250250;
int n;
ll a[N];
ll S;

bool solve(ll d) {
	ll bal = 0, minBal = 0;
	for (int i = 0; i < n; i++) {
		minBal = min(minBal, bal);
		bal += a[i] - d;
		if (bal - minBal > d) return false;
	}
	bal = minBal = 0;
	ll lft = S;
	for (int i = 0; i < n; i++) {
		lft -= a[i];
		if (3 * (bal - minBal) + a[i] > lft + 2 * d) return false;
		minBal = min(minBal, bal);
		bal += a[i] - d;
		if (bal - minBal > lft) return false;
	}
	bal = minBal = 0;
	lft = S;
	for (int i = n - 1; i >= 0; i--) {
		lft -= a[i];
		if (3 * (bal - minBal) + a[i] > lft + 2 * d) return false;
		minBal = min(minBal, bal);
		bal += a[i] - d;
		if (bal - minBal > lft) return false;
	}
	bal = minBal = 0;
	for (int i = 0; i < n; i++) {
		minBal = min(minBal, bal);
		bal += 2 * a[i] - d;
		if (bal - minBal > S - d) return false;
	}
	ll A = 0, B = S - a[0] - a[1];
	for (int i = 0; i < n - 1; i++) {
		if (2 * a[i] - 2 * A - B > d) return false;
		if (2 * a[i + 1] - A - 2 * B > d) return false;
		A += a[i];
		B -= a[i + 2];
	}
	return true;
}

void solve() {
	scanf("%d", &n);
	S = 0;
	for (int i = 0; i < n; i++) {
		scanf("%lld", &a[i]);
		S += a[i];
	}
	ll l = 0, r = S;
	while(r - l > 1) {
		ll d = (l + r) / 2;
		if (solve(d))
			r = d;
		else
			l = d;
	}
	printf("%lld\n", r);
}

int main() {
	startTime = clock();
//	freopen("input.txt", "r", stdin);
//	freopen("output.txt", "w", stdout);

	int t;
	scanf("%d", &t);
	for (int i = 1; i <= t; i++) {
		eprintf("--- Case #%d start ---\n", i);
		//printf("Case #%d: ", i);

		solve();

		//printf("%lld\n", (ll)solve());

		/*
		if (solve()) {
			printf("Yes\n");
		} else {
			printf("No\n");
		}
		*/

		eprintf("--- Case #%d end ---\n", i);
		eprintf("time = %.5lf\n", getCurrentTime());
		eprintf("++++++++++++++++++++\n");
	}


	return 0;
}

Submission Info

Compile Error

Main.cpp: In function ‘int main()’:
Main.cpp:30:30: warning: statement has no effect [-Wunused-value]
   30 |         #define eprintf(...) 42
      |                              ^~
Main.cpp:149:17: note: in expansion of macro ‘eprintf’
  149 |                 eprintf("--- Case #%d start ---\n", i);
      |                 ^~~~~~~
Main.cpp:30:30: warning: statement has no effect [-Wunused-value]
   30 |         #define eprintf(...) 42
      |                              ^~
Main.cpp:164:17: note: in expansion of macro ‘eprintf’
  164 |                 eprintf("--- Case #%d end ---\n", i);
      |                 ^~~~~~~
Main.cpp:30:30: warning: statement has no effect [-Wunused-value]
   30 |         #define eprintf(...) 42
      |                              ^~
Main.cpp:165:17: note: in expansion of macro ‘eprintf’
  165 |                 eprintf("time = %.5lf\n", getCurrentTime());
      |                 ^~~~~~~
Main.cpp:30:30: warning: statement has no effect [-Wunused-value]
   30 |         #define eprintf(...) 42
      |                              ^~
Main.cpp:166:17: note: in expansion of macro ‘eprintf’
  166 |                 eprintf("++++++++++++++++++++\n");
      |                 ^~~~~~~
Main.cpp: In function ‘void solve()’:
Main.cpp:124:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  124 |         scanf("%d", &n);
      |         ~~~~~^~~~~~~~~~
Main.cpp:127:22: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  127 |                 scanf("%lld", &a[i]);
      |                 ~~~~~^~~~~~~~~~~~~~~
Main.cpp: In function ‘int main()’:
Main.cpp:147:14: warning: ignoring return value of ‘int scanf(const char*, ...)’ declared with attribute ‘warn_unused_result’ [-Wunused-result]
  147 |         scanf("%d", &t);
      |         ~~~~~^~~~~~~~~~

Judge Result