Codeforces Round #378 (Div. 2), problem: (E) Sleep in Class Solution in C

#include
#define ABS(a) ((a) < 0 ? (a) : (a)) #define MIN(a, b) ((a) < (b) ? (a) : (b)) #define MAX(a, b) ((a) > (b) ? (a) : (b))
#define TRUE 1
#define FALSE 0

#define getchar_unlocked() getchar()

long long fast_in()
{
static long long j_fast;
static char c_fast;
j_fast = 0;
c_fast = getchar_unlocked();
while (c_fast < '0' || c_fast > ‘9’)
c_fast = getchar_unlocked();
while (c_fast >= ‘0’ && c_fast <= '9') { j_fast = (j_fast << 1) + (j_fast << 3) + c_fast - '0'; c_fast = getchar_unlocked(); } return j_fast; } #define MAXN 1000006 long long n, a[MAXN], ans[MAXN], down[MAXN], up[MAXN], wdown[MAXN], wup[MAXN]; long long binary_search_up(long long req) { // search for last occurance static long long f, l, m; f = 1; l = n + 1; while ((l - f) > 1) {
m = ((l + f) >> 1);
if (up[m] >= req)
f = m;
else
l = m;
}
if (up[l] == req)
return l;
else
return f;
}
long long binary_search_down(long long req)
{
// search for first occurance
static long long f, l, m;
f = 0;
l = n;
while ((l – f) > 1) {
m = ((l + f) >> 1);
if (down[m] < req) f = m; else l = m; } if (down[f] == req) return f; else return l; } int main() { static long long i, considered, uptill, downtill; static char c; n = fast_in(); for (i = 1; i <= n; i++) { c = getchar_unlocked(); if (c == 'U') a[i] = 1; else a[i] = 0; } for (i = 1; i <= n; i++) { if (a[i]) down[i] = down[i - 1]; else down[i] = down[i - 1] + 1; } for (i = 0; i <= n; i++) { if (a[i]) wdown[i] = wdown[i - 1]; else wdown[i] = wdown[i - 1] + i; } for (i = n; i > 0; i–) {
if (a[i])
up[i] = up[i + 1] + 1;
else
up[i] = up[i + 1];
}
for (i = n; i > 0; i–) {
if (a[i])
wup[i] = wup[i + 1] + (n – i + 1);
else
wup[i] = wup[i + 1];
}
up[0] = up[1];
wup[0] = wup[1];
down[n + 1] = down[n];
wdown[n + 1] = wdown[n];
// for (i = 0; i <= n + 1; i++) { // printf("%lld %lld %lld %lld\n", up[i], down[i], wup[i], // wdown[i]); // } for (i = 1; i <= n; i++) { considered = MIN(up[0] - up[i], down[n] - down[i]); if (a[i]) { downtill = binary_search_down(considered + down[i] + 1); uptill = binary_search_up(considered + up[i]); } else { downtill = binary_search_down(considered + down[i]); uptill = binary_search_up(considered + up[i] + 1); } ans[i] = (wdown[downtill] - wdown[i] - i * (down[downtill] - down[i])); ans[i] += (wup[uptill] - wup[i] - (n - i + 1) * (up[uptill] - up[i])); ans[i] <<= 1; //printf("%lld considered %lld downtill %lld uptill %lld\n", i, // considered, downtill, uptill); if (a[i]) { if ((down[n] - down[i]) > (up[0] – up[i]))
ans[i] += i;
else
ans[i] += (n – i + 1);
} else {
if ((down[n] – down[i]) >= (up[0] – up[i]))
ans[i] += i;
else
ans[i] += (n – i + 1);
}
}
for (i = 1; i <= n; i++) printf("%lld ", ans[i]); return 0; }

Labour markets may risk...

The Reality Check of AI in the Modern Labor...

Edmonton hospital using medical...

The Royal Alexandra Hospital in Edmonton is pioneering a...

Why Everyone is Obsessed with the Motion Sensor Night Lights

Are you tired of dealing with everyday frustrations that slow down your routine? We've all been...

Labour markets may risk a milder shock than AI fantasies suggest, but that’s only partial relief

The Reality Check of AI in the Modern Labor Market For the past few years, the dominant narrative surrounding artificial intelligence (AI) has been one...

Why Everyone is Obsessed with the TSA Approved Toiletry Bags

Are you tired of dealing with everyday frustrations that slow down your routine? We've all been...

Why Everyone is Obsessed with the Phone Screen Cleaner Spray

Are you tired of dealing with everyday frustrations that slow down your routine? We've all been...

Edmonton hospital using medical technology to offer non-surgical weight loss procedure

The Royal Alexandra Hospital in Edmonton is pioneering a new era of healthcare in Alberta by offering an innovative, non-surgical weight loss procedure. This...

Why Everyone is Obsessed with the Silicone Spatula Set

Are you tired of dealing with everyday frustrations that slow down your routine? We've all been...

T.O.P’s Comeback Has Nothing to Hide on Debut Solo Album

Choi Seung-hyun, universally known as T.O.P, is preparing to make a monumental return to the music scene. After cementing his legacy as a pioneering...

Why Everyone is Obsessed with the Blue Light Blocking Glasses

Are you tired of dealing with everyday frustrations that slow down your routine? We've all been...

Why Everyone is Obsessed with the Stain Remover for Clothes

Are you tired of dealing with everyday frustrations that slow down your routine? We've all been...