Submission #305945

#	Time	Username	Problem	Language	Result	Execution time	Memory
305945		llaki	Packing Biscuits (IOI20_biscuits)	C++17	0 / 100	1086 ms	16120 KiB

biscuits

#include <vector>
#include <map>
#include "biscuits.h"

long long count_tastiness(long long x, std::vector<long long> a) {
	std::map<long long, long long> freq;
	freq[a[0]] = 1;
	for (int pos = 0; pos < a.size() - 1; pos++) {
		std::map<long long, long long> map;
		for (const auto &[y, value]: freq) {
			long long val = a[pos + 1] + y / 2;
			long long oldFreq = 0;
			if (freq.find(val) != freq.end()) {
				oldFreq = map[val];
			}
			map[val] = oldFreq + freq[y];
			if (y >= x) {
				val = a[pos + 1] + (y - x) / 2;
				oldFreq = 0;
				if (freq.find(val) != freq.end()) {
					oldFreq = map[val];
				}
				map[val] = oldFreq + freq[y];
			}
		}
		freq = map;
	}
	long long ans = 0;
	for (const auto &[y, value]: freq) {
		ans += value * (y / x + 1);
	}
	return ans;
}

Compilation message (stderr)

biscuits.cpp: In function 'long long int count_tastiness(long long int, std::vector<long long int>)':
biscuits.cpp:8:24: 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 pos = 0; pos < a.size() - 1; pos++) {
      |                    ~~~~^~~~~~~~~~~~~~

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