Submission #366180

#	Time	Username	Problem	Language	Result	Execution time	Memory
366180		dolphingarlic	Packing Biscuits (IOI20_biscuits)	C++14	42 / 100	1002 ms	12524 KiB

biscuits

#include "biscuits.h"

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

ll count_tastiness(ll x, vector<ll> a) {
	for (int i = 0; i < a.size(); i++) if (a[i] > x) {
		ll to_merge = ((a[i] - x) >> 1) << 1;
		if (to_merge) {
			if (i == a.size() - 1) a.push_back(to_merge >> 1);
			else a[i + 1] += (to_merge >> 1);
		}
		a[i] -= to_merge;
	}
	a.push_back(0);
	
	ll ans = 1;
	map<pair<int, ll>, ll> mp;
	mp[{0, a[0]}] = 1;
	while (mp.size()) {
		pair<int, ll> dat;
		ll cnt;
		tie(dat, cnt) = *mp.begin();
		mp.erase(mp.begin());
		if (dat.first != a.size() - 1)
			mp[{dat.first + 1, a[dat.first + 1] + (dat.second >> 1)}] += cnt;
		if (dat.second >= x) {
			ans += cnt;
			if (dat.first != a.size() - 1)
				mp[{dat.first + 1, a[dat.first + 1] + (dat.second - x >> 1)}] += cnt;
		}
	}
	return ans;
}

Compilation message (stderr)

biscuits.cpp: In function 'll count_tastiness(ll, std::vector<long long int>)':
biscuits.cpp:8:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    8 |  for (int i = 0; i < a.size(); i++) if (a[i] > x) {
      |                  ~~^~~~~~~~~~
biscuits.cpp:11:10: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   11 |    if (i == a.size() - 1) a.push_back(to_merge >> 1);
      |        ~~^~~~~~~~~~~~~~~
biscuits.cpp:26:17: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   26 |   if (dat.first != a.size() - 1)
      |       ~~~~~~~~~~^~~~~~~~~~~~~~~
biscuits.cpp:30:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   30 |    if (dat.first != a.size() - 1)
      |        ~~~~~~~~~~^~~~~~~~~~~~~~~
biscuits.cpp:31:55: warning: suggest parentheses around '-' inside '>>' [-Wparentheses]
   31 |     mp[{dat.first + 1, a[dat.first + 1] + (dat.second - x >> 1)}] += cnt;
      |                                            ~~~~~~~~~~~^~~

• Subtask 1: 9 / 9
• Subtask 2: 12 / 12
• Subtask 3: 21 / 21
• Subtask 4: 0 / 35
• Subtask 5: 0 / 23