Submission #412384

#	Time	Username	Problem	Language	Result	Execution time	Memory
412384		Ahmadsm2005	Seats (IOI18_seats)	C++14	11 / 100	4065 ms	43720 KiB

seats

#include "seats.h"
//#include "grader.cpp"
#include<bits/stdc++.h>
using namespace std;
vector<vector<int>>MAT;
pair<int,int>MP[1000001];
int w,h;
int check(int L,int R,int L2,int R2){
int maxer=0;
for(int i=L;i<=R;i++){
for(int l=L2;l<=R2;l++)
maxer=max(maxer,MAT[i][l]);
}
return maxer;
}
int REC(int x1,int x2,int y1,int y2,int MAXER=0){
int MINER=INT_MAX,MINER2=INT_MAX,MINER3=INT_MAX,MINER4=INT_MAX;
int maxer=0;
if(x1)
MINER=check(x1-1,x1-1,y1,y2);
if(x2+1<h)
MINER2=check(x2+1,x2+1,y1,y2);
if(y1)
MINER3=check(x1,x2,y1-1,y1-1);
if(y2+1<w)
MINER4=check(x1,x2,y2+1,y2+1);
int MINER5=min(min(MINER,MINER2),min(MINER3,MINER4));
if(MINER5==INT_MAX)
return 1;
if(MINER5==MINER)
return REC(x1-1,x2,y1,y2,max(MAXER,MINER5))+((x2-x1+1)*(y2-y1+1)==(MAXER+1)?1:0);
else if(MINER5==MINER2)
return REC(x1,x2+1,y1,y2,max(MAXER,MINER5))+((x2-x1+1)*(y2-y1+1)==(MAXER+1)?1:0);
else if(MINER5==MINER3)
return REC(x1,x2,y1-1,y2,max(MAXER,MINER5))+((x2-x1+1)*(y2-y1+1)==(MAXER+1)?1:0);
else if(MINER5==MINER4)
return REC(x1,x2,y1,y2+1,max(MAXER,MINER5))+((x2-x1+1)*(y2-y1+1)==(MAXER+1)?1:0);
}
void give_initial_chart(int H,int W,vector<int>R,vector<int>C){
h=H,w=W;
MAT.resize(H);
for(int i=0;i<H;i++)
MAT[i].resize(W);
for(int i=0;i<H*W;i++)
MAT[R[i]][C[i]]=i,MP[i]={R[i],C[i]};
}
int swap_seats(int a,int b){
swap(MAT[MP[a].first][MP[a].second],MAT[MP[b].first][MP[b].second]);
swap(MP[a],MP[b]);
return REC(MP[0].first,MP[0].first,MP[0].second,MP[0].second);
}

Compilation message (stderr)

seats.cpp: In function 'int REC(int, int, int, int, int)':
seats.cpp:18:5: warning: unused variable 'maxer' [-Wunused-variable]
   18 | int maxer=0;
      |     ^~~~~
seats.cpp:38:1: warning: control reaches end of non-void function [-Wreturn-type]
   38 | }
      | ^

• Subtask 1: 5 / 5
• Subtask 2: 6 / 6
• Subtask 3: 0 / 20
• Subtask 4: 0 / 6
• Subtask 5: 0 / 33
• Subtask 6: 0 / 30