Submission #921037

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
921037	2024-02-03 09:04:15	ttamx	The Kingdom of JOIOI (JOI17_joioi)	C++14	100 / 100	360 ms	117864 KiB

joioi

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#include<bits/stdc++.h>
using namespace std;
const int N=2005;
const int INF=1e9;
int n,m;
int a[N][N],lmx[N][N],rmx[N][N],lmn[N][N],rmn[N][N];
int mn=INF;
int bsearch(int i,int v){
    int l=1,r=m;
    while(l<r){
        int m=(l+r)/2;
        if(rmx[i][m]<=v)r=m;
        else l=m+1;
    }
    return l;
}
bool check1(int d){
    stack<pair<int,int>> s;
    for(int i=1;i<=n;i++){
        int p=upper_bound(lmx[i]+1,lmx[i]+m,mn+d)-lmx[i]-1;
        while(!s.empty()&&s.top().second>p)s.pop();
        s.emplace(i,p);
    }
    int lo=INF,hi=0,p;
    for(int i=n;i>=1;i--){
 
 
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Compilation message (stderr)

joioi.cpp: In function 'bool check3(int)':
joioi.cpp:75:27: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
   75 |         lo=min(lo,rmn[i][p+1]);
      |                          ~^~
joioi.cpp: In function 'bool check2(int)':
joioi.cpp:55:27: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
   55 |         lo=min(lo,lmn[i][p-1]);
      |                          ~^~
joioi.cpp: In function 'bool check4(int)':
joioi.cpp:95:27: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
   95 |         lo=min(lo,lmn[i][p-1]);
      |                          ~^~
joioi.cpp: In function 'bool check1(int)':
joioi.cpp:35:27: warning: 'p' may be used uninitialized in this function [-Wmaybe-uninitialized]
   35 |         lo=min(lo,rmn[i][p+1]);
      |                          ~^~

• Subtask 1: 15 / 15
• Subtask 2: 45 / 45
• Subtask 3: 40 / 40