제출 #1027446

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
1027446		KhoaDuy	Real Mountains (CCO23_day1problem2)	C++14	0 / 25	0 ms	348 KiB

Main

#include <iostream>
#include <vector>
#include <climits>

int main() {
    int N;
    std::cin >> N;
    
    std::vector<int> h(N+1); // 1-indexed array to store heights
    for(int i = 1; i <= N; i++) {
        std::cin >> h[i];
    }
    
    std::vector<std::vector<int>> dp(N+1, std::vector<int>(N+1, INT_MAX));
    
    std::vector<int> sum(N+1, 0); // prefix sum of heights
    for(int j = 1; j <= N; j++) {
        sum[j] = sum[j-1] + h[j];
    }
    
    for(int j = 1; j <= N; j++) {
        dp[j][j] = 0; // Cost to create a single peak at column j with the last peak at column j is zero
        for(int i = 1; i < j; i++) {
            int cost = (h[i] <= h[j] && h[j] <= h[i+1]) ? (sum[j-1] - sum[i]) : INT_MAX;
            if(cost != INT_MAX) {
                dp[j][j] = std::min(dp[j][j], dp[i][j-1] + cost);
            }
        }
    }
    
    int minCost = INT_MAX;
    for(int j = 1; j <= N; j++) {
        minCost = std::min(minCost, dp[N][j]);
    }
    
    std::cout << minCost << std::endl;
    
    return 0;
}

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