Submission #71428

#	Time	Username	Problem	Language	Result	Execution time	Memory
71428		Kmcode	Wiring (IOI17_wiring)	C++14	10 / 100	273 ms	192172 KiB

wiring

#include<bits/stdc++.h>
//#include "books.h"
using namespace std;

#define MAX 100002
int n;
long long int dp[MAX][110];
int pos[MAX];
long long min_total_length(std::vector<int> r, std::vector<int> b) {
	for(int i=0;i<r.size();i++){
		for(int j=0;j<200;j++){
			dp[i][j]=LLONG_MAX;
		}
		pos[i]=lower_bound(b.begin(),b.end(),r[i])-b.begin();
	}
	int x=50;
	dp[0][0-pos[0]+x]=abs(r[0]-b[0]);
	for(int i=0;i<r.size();i++){
		for(int j1=0;j1<100;j1++){
			int j=pos[i]+j1-x;
			if(j<0||j>=b.size())continue;
			if(dp[i][j1]==LLONG_MAX)continue;
			long long int val=dp[i][j1];
			if(i+1<r.size()){
				int base=pos[i+1]-x;
				if(j-base>=0)dp[i+1][j-base]=min(dp[i+1][j-base],val+(long long int)abs(r[i+1]-b[j]));
			}
			if(j+1<b.size()){
				int base=pos[i]-x;
				if(j+1-base>=0)dp[i][j+1-base]=min(dp[i][j+1-base],val+(long long int)abs(r[i]-b[j+1]));
			}
			if(i+1<r.size()&&j+1<b.size()){
				int base=pos[i+1]-x;
				if(j+1-base>=0)dp[i+1][j+1-base]=min(dp[i+1][j+1-base],val+(long long int)abs(r[i+1]-b[j+1]));
			}
		}
	}
	return dp[r.size()-1][b.size()-1-pos[r.size()-1]+x];
}

Compilation message (stderr)

wiring.cpp: In function 'long long int min_total_length(std::vector<int>, std::vector<int>)':
wiring.cpp:10:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<r.size();i++){
              ~^~~~~~~~~
wiring.cpp:18:15: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
  for(int i=0;i<r.size();i++){
              ~^~~~~~~~~
wiring.cpp:21:13: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(j<0||j>=b.size())continue;
            ~^~~~~~~~~~
wiring.cpp:24:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(i+1<r.size()){
       ~~~^~~~~~~~~
wiring.cpp:28:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(j+1<b.size()){
       ~~~^~~~~~~~~
wiring.cpp:32:10: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(i+1<r.size()&&j+1<b.size()){
       ~~~^~~~~~~~~
wiring.cpp:32:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
    if(i+1<r.size()&&j+1<b.size()){
                     ~~~^~~~~~~~~
wiring.cpp:12:12: warning: iteration 110 invokes undefined behavior [-Waggressive-loop-optimizations]
    dp[i][j]=LLONG_MAX;
            ^
wiring.cpp:11:16: note: within this loop
   for(int j=0;j<200;j++){
               ~^~~~

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