Submission #99998

#	Time	Username	Problem	Language	Result	Execution time	Memory
99998		rocketninja7	Roller Coaster Railroad (IOI16_railroad)	C++14	0 / 100	99 ms	5048 KiB

railroad

#include "railroad.h"
#include <algorithm>

long long int memo[16][1<<16];

long long int recursion(int curr, int bitmask, std::vector<int> s, std::vector<int> t){
    if(memo[curr][bitmask]!=-1){
        return memo[curr][bitmask];
    }
    long long int ans=15000000000;
    for(int i=0;i<s.size();i++){
        if(bitmask&(1<<i)){
            ans=std::min(ans, recursion(i, bitmask-(1<<i), s, t)+t[curr]-s[i]);
        }
    }
    return memo[curr][bitmask]=ans;
}

long long plan_roller_coaster(std::vector<int> s, std::vector<int> t) {
    int n = (int) s.size();
    if(n<=16){
        long long int ans=15000000000;
        for(int i=0;i<n;i++){
            ans=std::min(ans, recursion(i, (1<<n)-1-(i<<i), s, t));
        }
        return ans;
    }
    std::pair<int, int> tsect[n];
    for(int i=0;i<n;i++){
        tsect[i]=std::make_pair(t[i], i);
    }
    std::sort(tsect, tsect+n);

    return 0;
}

Compilation message (stderr)

railroad.cpp: In function 'long long int recursion(int, int, std::vector<int>, std::vector<int>)':
railroad.cpp:11:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
     for(int i=0;i<s.size();i++){
                 ~^~~~~~~~~

• Subtask 1: 0 / 11
• Subtask 2: 0 / 23
• Subtask 3: 0 / 30
• Subtask 4: 0 / 36