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Candies.cpp
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Candies.cpp
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//Copyright [2018] [Haibo Yan]
//
//Licensed under the Apache License, Version 2.0 (the "License");
//you may not use this file except in compliance with the License.
//You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
//Unless required by applicable law or agreed to in writing, software
//distributed under the License is distributed on an "AS IS" BASIS,
//WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
//See the License for the specific language governing permissions and
//limitations under the License.
//
// Created by Haibo Yan on 4/10/18.
//
#include "Candies.h"
#include <algorithm>
#include <numeric>
int Candies::candy(const vector<int>& ratings) {
vector<int> candies;
candies.push_back(1);
for (int i = 1; i < ratings.size(); i++) {
if (ratings[i] > ratings[i - 1]) {
candies.push_back(candies[i - 1] + 1);
} else {
candies.push_back(1);
}
}
for (int i = ratings.size() - 2; i >= 0; i--) {
if (ratings[i] > ratings[i + 1]) {
candies[i] = candies[i + 1] + 1;
}
}
return accumulate(candies.begin(), candies.end(), 0);
}