Submission #1107746

#	Time	Username	Problem	Language	Result	Execution time	Memory
1107746		KasymK	Chessboard (IZhO18_chessboard)	C++17	0 / 100	1 ms	760 KiB

chessboard

#include "bits/stdc++.h"
using namespace std;
#define ff first
#define ss second
#define all(v) v.begin(), v.end()
#define ll long long
#define pb push_back
#define pii pair<int, int>
#define pli pair<ll, int>
#define pll pair<ll, ll>
#define tr(i, c) for(auto i = c.begin(); i != c.end(); ++i)
#define wr puts("----------------")
template<class T>bool umin(T& a,T b){if(a>b){a=b;return 1;}return 0;}
template<class T>bool umax(T& a,T b){if(a<b){a=b;return 1;}return 0;}

int main(){
    int n, k;
    scanf("%d%d", &n, &k);
    if(k==0){
        if(!(n&1))
            printf("%lld\n", (n*1ll*n)/2);
        else{
            ll answer = 0;
            answer += (n/2)*1ll*((n+1)/2);
            answer += ((n+1)/2)*1ll*(n/2);
            printf("%lld\n", answer);
        }
        return 0;
    }
    assert(false);
    return 0;
}

Compilation message (stderr)

chessboard.cpp: In function 'int main()':
chessboard.cpp:18:10: warning: ignoring return value of 'int scanf(const char*, ...)' declared with attribute 'warn_unused_result' [-Wunused-result]
   18 |     scanf("%d%d", &n, &k);
      |     ~~~~~^~~~~~~~~~~~~~~~

• Subtask 1: 0 / 8
• Subtask 2: 0 / 8
• Subtask 3: 0 / 15
• Subtask 4: 0 / 16
• Subtask 5: 0 / 23
• Subtask 6: 0 / 30