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TimeDurationCalculator.cpp
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182 lines (146 loc) · 4.65 KB
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#include <bits/stdc++.h>
using namespace std;
/* something starts */
/* something ends */
/* typedef starts */
typedef long long ll;
typedef unsigned long long ull;
/* typedef ends */
/* macro starts */
#define PI acos(-1.0)
/* macro ends */
bool LeapYears[2200];
const ull SECONDS_IN_A_MINUTE = 60;
const ull SECONDS_IN_AN_HOUR = 3600;
const ull SECONDS_IN_A_DAY = 86400;
ull SECONDS_IN_28_DAY_MONTH;
ull SECONDS_IN_29_DAY_MONTH;
ull SECONDS_IN_30_DAY_MONTH;
ull SECONDS_IN_31_DAY_MONTH;
ull SECONDS_IN_NON_LEAP_YEAR;
ull SECONDS_IN_LEAP_YEAR;
int daysNonLeap[13] = {0, 31, 28, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
int daysLeap[13] = {0, 31, 29, 31, 30, 31, 30, 31, 31, 30, 31, 30, 31};
bool isLeap(int year)
{
if (year % 400 == 0 || (year & 4 == 0 && year % 100 != 0)) {
return true;
}
return false;
}
int getMonth(string m)
{
if (m == "Jan") return 1;
else if (m == "Feb") return 2;
else if (m == "Mar") return 3;
else if (m == "Apr") return 4;
else if (m == "May") return 5;
else if (m == "Jun") return 6;
else if (m == "Jul") return 7;
else if (m == "Aug") return 8;
else if (m == "Sep") return 9;
else if (m == "Oct") return 10;
else if (m == "Nov") return 11;
else if (m == "Dec") return 12;
}
int getAMPM(string AMPM)
{
if (AMPM == "AM") return 1;
return 2;
}
ull countSecondsFrom1899(int date, int mon, int year, int hh, int mm, int ss, int AMPM)
{
ull seconds = 0;
int i;
for (i = 1899; i < year; i++) {
if (LeapYears[i]) {
seconds += SECONDS_IN_LEAP_YEAR;
}
else {
seconds += SECONDS_IN_NON_LEAP_YEAR;
}
}
int passedMonth = mon - 1;
if (LeapYears[year]) {
for (i = 1; i <= passedMonth; i++) {
seconds += (daysLeap[i] * SECONDS_IN_A_DAY);
}
}
else {
for (i = 1; i <= passedMonth; i++) {
seconds += (daysNonLeap[i] * SECONDS_IN_A_DAY);
}
}
int passedDay = date - 1;
for (i = 1; i <= passedDay; i++) {
seconds += SECONDS_IN_A_DAY;
}
seconds += ((hh * SECONDS_IN_AN_HOUR) + (mm * SECONDS_IN_A_MINUTE) + ss);
if (AMPM == 2) {
seconds += (12 * SECONDS_IN_AN_HOUR);
}
return seconds;
}
int main()
{
//freopen("in.txt", "r", stdin);
//freopen("out.txt", "w", stdout);
ios::sync_with_stdio(false);
cin.tie(NULL);
cout.tie(NULL);
int y;
for (y = 1899; y <= 2100; y++) {
LeapYears[y] = isLeap(y);
}
int test, t, i;
int sDate, fDate, sMon, fMon, sYear, fYear, sHH, fHH, sMM, fMM, sSS, fSS, sAP, fAP;
string _sMon, _fMon, _sAP, _fAP;
string temp; /// for "at"
char ch; /// for ':'
cin >> test;
for (t = 1; t <= test; t++) {
// inpute format sample:
// 7 Jun 2018 at 04:45:32 PM
// 8 Jun 2018 at 07:20:12 PM
cin >> sDate >> _sMon >> sYear >> temp >> sHH >> ch >> sMM >> ch >> sSS >> _sAP;
cin >> fDate >> _fMon >> fYear >> temp >> fHH >> ch >> fMM >> ch >> fSS >> _fAP;
sMon = getMonth(_sMon);
fMon = getMonth(_fMon);
sAP = getAMPM(_sAP);
fAP = getAMPM(_fAP);
SECONDS_IN_28_DAY_MONTH = SECONDS_IN_A_DAY * 28;
SECONDS_IN_29_DAY_MONTH = SECONDS_IN_A_DAY * 29;
SECONDS_IN_30_DAY_MONTH = SECONDS_IN_A_DAY * 30;
SECONDS_IN_31_DAY_MONTH = SECONDS_IN_A_DAY * 31;
SECONDS_IN_LEAP_YEAR = 0;
for (i = 1; i <= 12; i++) {
SECONDS_IN_LEAP_YEAR += (SECONDS_IN_A_DAY * daysLeap[i]);
}
SECONDS_IN_NON_LEAP_YEAR = 0;
for (i = 1; i <= 12; i++) {
SECONDS_IN_NON_LEAP_YEAR += (SECONDS_IN_A_DAY * daysNonLeap[i]);
}
ull countForStart = countSecondsFrom1899(sDate, sMon, sYear, sHH, sMM, sSS, sAP);
ull countForFinish = countSecondsFrom1899(fDate, fMon, fYear, fHH, fMM, fSS, fAP);
ull ans = countForFinish - countForStart;
//cout << ans << endl;
ull ansDay = ans / SECONDS_IN_A_DAY;
ans %= SECONDS_IN_A_DAY;
ull ansHour = ans / SECONDS_IN_AN_HOUR;
ans %= SECONDS_IN_AN_HOUR;
ull ansMinute = ans / SECONDS_IN_A_MINUTE;
ans %= SECONDS_IN_A_MINUTE;
cout << "Case " << t << ": ";
if (ansDay != 0) {
cout << ansDay << "d ";
}
if (ansHour != 0) {
cout << ansHour << "h ";
}
if (ansMinute != 0) {
cout << ansMinute << "m ";
}
cout << ans << "s\n";
}
return 0;
}