Submission #420881

#	Time	Username	Problem	Language	Result	Execution time	Memory
420881		MDario	Wiring (IOI17_wiring)	C++11	0 / 100	1 ms	204 KiB

wiring

#include "wiring.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define F first
#define S second
long long min_total_length(vector<int> r, vector<int> b) {
    ll n=r.size(), m=b.size(), c[20];
    vector<pair<ll, bool>> v;
    for(int i=0; i<n; i++)v.push_back({r[i], 0});
    for(int i=0; i<m; i++)v.push_back({b[i], 1});
//    if(r[0]<b[0])
        v.push_back({0, 0});
//    else v.push_back({0, 1});
    sort(v.begin(), v.end());
    ll dp[v.size()], a[v.size()];
    c[0]=-1;
    c[1]=-1;
    dp[0]=0;
    a[0]=0;
    for(int i=1; i<v.size(); i++){
        a[i]=v[i].F+a[i-1];
    }
    for(int i=1; i<v.size(); i++){
        if(v[i].S==0){
            if(c[1]==-1)dp[i]=1000000000000000ll;
            else{
                if(v[i-1].S==0){
                    dp[i]=a[i]-a[c[1]]-(i-c[1])*v[c[1]].F+min(dp[c[1]], dp[c[1]-1]);
                }
                else{
                    dp[i]=v[i].F-v[i-1].F+dp[i-2];
                    for(int t=i-2; v[t].S==1; t--)dp[i]=min(dp[i], v[i].F*(i-t)-(a[i-1]-a[t-1])+dp[t-1]);
                }
            }
            c[0]=i;
        }
        else{
            if(c[0]==-1)dp[i]=1000000000000000ll;
            else{
                if(v[i-1].S==1){
                    dp[i]=a[i]-a[c[0]]-(i-c[0])*v[c[0]].F+min(dp[c[0]], dp[c[0]-1]);
                }
                else{
                    dp[i]=v[i].F-v[i-1].F+dp[i-2];
                    for(int t=i-2; v[t].S==0; t--)dp[i]=min(dp[i], v[i].F*(i-t)-(a[i-1]-a[t-1])+dp[t-1]);
                }
            }
            c[1]=i;
        }
    }
	return dp[n+m];
}

Compilation message (stderr)

wiring.cpp: In function 'long long int min_total_length(std::vector<int>, std::vector<int>)':
wiring.cpp:21:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   21 |     for(int i=1; i<v.size(); i++){
      |                  ~^~~~~~~~~
wiring.cpp:24:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<long long int, bool> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   24 |     for(int i=1; i<v.size(); i++){
      |                  ~^~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 13
• Subtask 3: 0 / 10
• Subtask 4: 0 / 25
• Subtask 5: 0 / 45