Submission #817891

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
817891	2023-08-09 19:11:45	Isam	Watching (JOI13_watching)	C++17	100 / 100	278 ms	8620 KiB

watching

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#include<iostream>
#include<algorithm>
using namespace std;
int n, p, q;
const int MAX = 2001;
int dp[MAX][MAX];
int x[MAX];
int Find(int pos, int seg){
    int xpos = x[pos + 1] + seg - 1;
    int l = pos + 1, r = n - 1, mid, last = pos;
    while(l <= r){
            mid = l + ((r - l) >> 1);
            if(x[mid] <= xpos){
                last = mid;
                l = mid + 1;
            }else{
                r = mid - 1;
            }
    }
    return last;
}
bool check(int& w){
    dp[0][0] = -1;
    for(int i = 0; i <= p; ++i){
        for(int j = 0; j <= q; ++j){
                if(!i && !j) continue;
                if(!i) dp[i][j] = Find(dp[i][j-1], (w << 1));
 
 
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Compilation message (stderr)

watching.cpp: In function 'int solve()':
watching.cpp:45:33: warning: 'w' may be used uninitialized in this function [-Wmaybe-uninitialized]
   45 |     int l = 1, r = x[n-1], mid, w;
      |                                 ^

• Subtask 1: 50 / 50
• Subtask 2: 50 / 50