Submission #421073

#	Time	Username	Problem	Language	Result	Execution time	Memory
421073		MDario	Wiring (IOI17_wiring)	C++11	13 / 100	56 ms	8624 KiB

wiring

#include "wiring.h"
#include<bits/stdc++.h>
using namespace std;
typedef long long ll;
#define F first
#define S second
ll a[200001];
vector<pair<ll, bool>> v;
ll f(ll af, ll bf, ll df){
    if(bf-af+1>df-bf){
        return (a[df]-a[bf])-(a[bf]-a[af-1])+((bf-af+1)-(df-bf))*v[bf+1].F;
    }
    else{
        return (a[df]-a[bf])-(a[bf]-a[af-1])-((df-bf)-(bf-af+1))*v[bf].F;
    }
}
long long min_total_length(vector<int> r, vector<int> b) {
    ll n=r.size(), m=b.size(), c[20];
    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, 1});
    else v.push_back({0, 0});
    sort(v.begin(), v.end());
    ll dp[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];
    }
    return f(1, n, n+m);
    for(int i=1; i<v.size(); i++){
        if(i+1<v.size())if(v[i].S==v[i+1].S)continue;
        if(v[i].S==0){
            dp[i]=1000000000000000ll;
            if(c[1]!=-1){
                for(int t=c[1]; v[t].S==1; t--)dp[i]=min(dp[i], f(t, c[1], i)+min(dp[t], dp[t-1]));
            }
            c[0]=i;
        }
        else{
            dp[i]=1000000000000000ll;
            if(c[0]!=-1){
                for(int t=c[0]; v[t].S==0; t--)dp[i]=min(dp[i], f(t, c[0], i)+min(dp[t], dp[t-1]));
            }
            c[1]=i;
        }
        cout << dp[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:30:19: 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]
   30 |     for(int i=1; i<v.size(); i++){
      |                  ~^~~~~~~~~
wiring.cpp:34:19: 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]
   34 |     for(int i=1; i<v.size(); i++){
      |                  ~^~~~~~~~~
wiring.cpp:35:15: 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]
   35 |         if(i+1<v.size())if(v[i].S==v[i+1].S)continue;
      |            ~~~^~~~~~~~~

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