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Cod sursa(job #257845)
#include <iostream>
#include <fstream>
#include <algorithm>
using namespace std;
const char iname[] = "ssm.in";
const char oname[] = "ssm.out";
const int MAXN = 7000005;
#define FOR(i, a, b) for (int i = (a); i <= (b); ++ i)
#define Max(a, b) ((a) > (b) ? (a) : (b))
int S[MAXN], n, bestSum = -int(2e9), beg, end;
void F(int lo, int hi) {
if (hi == lo) {
if (bestSum < S[hi])
bestSum = S[hi], beg = end = hi;
return ;
}
int mid = (hi + lo) / 2;
F(lo, mid);
F(mid + 1, hi);
int suf = 0, pre = 0, left, right;
int maxSuf = -int(1e9), maxPre = -int(1e9);
for (int i = mid; i >= lo; -- i) {
suf += S[i];
if (maxSuf <= suf) maxSuf = suf, left = i;
}
for (int i = mid + 1; i <= hi; ++ i) {
pre += S[i];
if (maxPre < pre) maxPre = pre, right = i;
}
if (maxPre + maxSuf > bestSum)
bestSum = maxPre + maxSuf, beg = left, end = right;
}
int main(void) {
ifstream in(iname);
in >> n;
FOR (i, 1, n) in >> S[i];
ofstream out(oname);
F(1, n);
out << bestSum << " " << beg << " " << end;
in.close(), out.close();
return 0;
}