Submission #818057

#	Time	Username	Problem	Language	Result	Execution time	Memory
818057		makanhulia	Lasers (NOI19_lasers)	C++17	24 / 100	63 ms	6044 KiB

lasers

#include<bits/stdc++.h>
using namespace std;
#define ll long long
void print(ll Z) {
    cout << Z << endl;
}
int main() {
     ios_base::sync_with_stdio(0);
     cin.tie(0);
     cout.tie(0);
    ll L, R;
    cin >> L >> R;
    if(R == 1) {
        // Subtask 1
        ll X;
        cin >> X;
        if(X == 1) {
            ll Y;
            cin >> Y;
            if(Y > L/2) {
                if(L % 2) print((Y -(L / 2))*2 - 1);
                else print((Y - (L / 2))*2);
            }
            else print(0);
        }
    }
    else {
        ll ans = 0;
        ll maxY = 0;
        while(R--){
            ll X;
            cin >> X;
            if(X == 1) {
                // Subtask 2
                ll Y;
                cin >> Y;
                maxY = max(maxY, Y);
            }
        }
        if(maxY > L/2) {
                if(L % 2) print((maxY -(L / 2))*2 - 1);
                else print((maxY - (L / 2))*2);
        }
         else print(0);
    }
    return 0;
}

Compilation message (stderr)

lasers.cpp: In function 'int main()':
lasers.cpp:28:12: warning: unused variable 'ans' [-Wunused-variable]
   28 |         ll ans = 0;
      |            ^~~

• Subtask 1: 10 / 10
• Subtask 2: 14 / 14
• Subtask 3: 0 / 20
• Subtask 4: 0 / 21
• Subtask 5: 0 / 22
• Subtask 6: 0 / 13