Submission #426810

#	Time	Username	Problem	Language	Result	Execution time	Memory
426810		Amylopectin	Lightning Rod (NOI18_lightningrod)	C++14	66 / 100	2053 ms	146188 KiB

Main

    //#include <iostream>
    //#include <stdio.h>
    //#include <stdlib.h>
    #include <bits/stdc++.h>
    using namespace std;
    const int mxn = 2e7 + 10;
    struct we
    {
        int xx,yy;
    };
    struct we a[mxn] = {};
    int main()
    {
        ios_base::sync_with_stdio(false);
        cin.tie(NULL);
        cout.tie(NULL);
        int i,j,n,m,ru = -1,cx,cy;
        cin >> n;
    //    scanf("%d",&n);
        for(i=0; i<n; i++)
        {
            cin >> cx >> cy;
    //        scanf("%d %d",&cx,&cy);
            while(ru >= 0 && cx - a[ru].xx <= cy - a[ru].yy)
            {
                ru --;
            }
            if(ru == -1 || cx - a[ru].xx > a[ru].yy - cy)
            {
                ru ++;
                a[ru] = {cx,cy};
            }
        }
        cout << ru + 1 << "\n";
    //    printf("%d\n",ru + 1);
        return 0;
    }

Compilation message (stderr)

lightningrod.cpp: In function 'int main()':
lightningrod.cpp:17:15: warning: unused variable 'j' [-Wunused-variable]
   17 |         int i,j,n,m,ru = -1,cx,cy;
      |               ^
lightningrod.cpp:17:19: warning: unused variable 'm' [-Wunused-variable]
   17 |         int i,j,n,m,ru = -1,cx,cy;
      |                   ^

• Subtask 1: 0 / 4
• Subtask 2: 7 / 7
• Subtask 3: 12 / 12
• Subtask 4: 21 / 21
• Subtask 5: 26 / 26
• Subtask 6: 0 / 10
• Subtask 7: 0 / 20