제출 #896974

#	제출 시각	아이디	문제	언어	결과	실행 시간	메모리
896974		nightfal	전선 연결 (IOI17_wiring)	C++14	0 / 100	1 ms	420 KiB

wiring

#include "wiring.h"
#include <cassert>
#include <cstdio>
#include <vector>
#include <climits>
#include <stdlib.h>
#include <algorithm>

using namespace std;
 
bool isSubtask1(std::vector<int> r, std::vector<int> b) {return r.size()<=200 && b.size()<=200;}
bool isSubtask2(std::vector<int> r, std::vector<int> b) {return r[r.size()-1]<b[0];}
bool isSubtask3(std::vector<int> r, std::vector<int> b) {
    int n=r.size(), m=b.size();
    vector<int> a(n+m);
   
    for(int i=0, j=0; i<n || j<m;)
        i==n? a[i+j++]=1: j==m? a[j+i++]=0: r[i]<b[j]? a[j+i++]=0:a[i+j++] = 1;

    int cnt = 1;
    for(int k=1; k<n+m; k++) {
        cnt = a[k]==a[k-1]? cnt+1:0;
        if (cnt > 6) return false;
    }
  return true;
}
 
long long subtask1(std::vector<int>, std::vector<int>);
long long subtask2(std::vector<int> &, std::vector<int> &, int, int, int, int);
long long subtask3(std::vector<int>, std::vector<int>);
long long min_total_length(std::vector<int>, std::vector<int> );

 
long long min_total_length(std::vector<int> r, std::vector<int> b) {
    // if (isSubtask4(r,b)) return subtask4(r,b);
    return subtask3(r,b);
    if (isSubtask3(r,b)) return subtask3(r,b);
  	else if (isSubtask2(r,b)) return subtask2(r,b,0,r.size()-1,0,b.size()-1);    
  	else if (isSubtask1(r,b)) return subtask1(r,b);
//     else return fullTask(r,b);
    return 0;
}
 
long long subtask3(std::vector<int> r, std::vector<int> b) {
    int n = r.size(), m = b.size();
    vector<pair<int,int>> a(n+m);
    
    for(int i=0, j=0; i<n || j<m;) // make_pair 내부에서 ++ 하면 안됨
        i==n? a[i+j++]=make_pair(j,1): j==m? a[j+i++]=make_pair(i,0): r[i]<b[j]? a[j+i++]=make_pair(i,0): a[i+j++]=make_pair(j,1);

    vector<long long> dp(n+m,LLONG_MAX);
    int prev=0, curr=0;
    for(curr=1; curr<n+m; curr++) 
        if (a[curr].second != a[curr-1].second) break;

    long long sumL=0, cntL=0, sumR=0, cntR=0;
    long long gap= a[prev].second==0? b[a[curr].first]-r[a[curr-1].first]: r[a[curr].first]-b[a[curr-1].first];

    for(int i=curr; i<n+m; i++) {
        // sumR += a[curr].second==0? r[a[i].first]-r[a[curr].first]:b[a[i].first]-b[a[curr].first];
        // cntR++;
        // for(int j=curr-1; j>=prev; j--) {
        //     cntL++; 
        //     sumL += a[prev].second==0? r[a[curr-1].first]-r[a[j].first]:b[a[curr-1].first]-b[a[j].first]; 
        //     long long temp = sumL + sumR + max(cntL,cntR)*gap;
        //     if (j!=0) temp += min(dp[j-1],dp[j]);        
        //     if (dp[i]>temp) dp[i]=temp;
        //     // printf("dp[%d,%d]=%d, sumL=%d, sumR=%d, gap=%d\n",i,j,dp[i],sumL,sumR,gap);

        // }
        // sumL=cntL=0;
        // if (i<n+m-1 && a[i].second != a[i+1].second) {
        //     prev=curr; curr=i+1; sumR=cntR=0;
        //     gap= a[prev].second==0? b[a[curr].first]-r[a[curr-1].first]: r[a[curr].first]-b[a[curr-1].first];
        // }

        for(int j =prev; j<curr; j++) {
            long long temp;
            if (a[prev].second==0)
                temp = subtask2(r,b,a[j].first,a[curr-1].first,a[curr].first,a[i].first);
            else
                temp = subtask2(b,r,a[j].first,a[curr-1].first,a[curr].first,a[i].first);
            
            if (j!=0) {
                long long minDP = min(dp[j-1],dp[j]);
                if (minDP < LLONG_MAX) temp += minDP;
            }
            if (dp[i]>temp) dp[i] = temp;            
        }
        if (i<n+m-1 && a[i].second != a[i+1].second) {prev = curr; curr = i+1;}
    }
    return dp[n+m-1];
}

long long subtask2(std::vector<int> &arr1, std::vector<int> &arr2, int s1, int e1, int s2, int e2) {
  long long sum1=0, sum2=0, n = e1-s1+1, m=e2-s2+1;
  for(int i=s1; i<=e1; i++) sum1 += arr1[e1] - arr1[i];
  for(int i=s2; i<=e2; i++) sum2 += arr2[i] - arr2[s2];
  return sum1+sum2+max(n,m)*(arr2[s2]-arr1[e1]);
}

long long subtask1(std::vector<int> r, std::vector<int> b) {
	int n = r.size(), m = b.size();
    long long dp[n][m];
  	dp[0][0] = abs(r[0]-b[0]);
  	for(int i=1; i<n; i++) dp[i][0] = dp[i-1][0] + abs(r[i]-b[0]);
    for(int j=1; j<m; j++) dp[0][j] = dp[0][j-1] + abs(r[0]-b[j]);
  	for(int i=1; i<n; i++)  	
      for(int j=1; j<m; j++)
        dp[i][j] = min(min(dp[i-1][j],dp[i][j-1]),dp[i-1][j-1]) + abs(r[i]-b[j]);

	return dp[n-1][m-1];
}
 

컴파일 시 표준 에러 (stderr) 메시지

wiring.cpp: In function 'long long int subtask3(std::vector<int>, std::vector<int>)':
wiring.cpp:56:15: warning: unused variable 'sumL' [-Wunused-variable]
   56 |     long long sumL=0, cntL=0, sumR=0, cntR=0;
      |               ^~~~
wiring.cpp:56:23: warning: unused variable 'cntL' [-Wunused-variable]
   56 |     long long sumL=0, cntL=0, sumR=0, cntR=0;
      |                       ^~~~
wiring.cpp:56:31: warning: unused variable 'sumR' [-Wunused-variable]
   56 |     long long sumL=0, cntL=0, sumR=0, cntR=0;
      |                               ^~~~
wiring.cpp:56:39: warning: unused variable 'cntR' [-Wunused-variable]
   56 |     long long sumL=0, cntL=0, sumR=0, cntR=0;
      |                                       ^~~~
wiring.cpp:57:15: warning: unused variable 'gap' [-Wunused-variable]
   57 |     long long gap= a[prev].second==0? b[a[curr].first]-r[a[curr-1].first]: r[a[curr].first]-b[a[curr-1].first];
      |               ^~~
wiring.cpp: In function 'long long int subtask1(std::vector<int>, std::vector<int>)':
wiring.cpp:109:7: warning: this 'for' clause does not guard... [-Wmisleading-indentation]
  109 |       for(int j=1; j<m; j++)
      |       ^~~
wiring.cpp:112:2: note: ...this statement, but the latter is misleadingly indented as if it were guarded by the 'for'
  112 |  return dp[n-1][m-1];
      |  ^~~~~~

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