Submission #496383

#	TimeUTC-0	Username	Problem	Language	Result	Execution time	Memory
496383	2021-12-21 06:42:02	kingline	Chessboard (IZhO18_chessboard)	C++17	70 / 100	220 ms	4248 KiB

chessboard

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/*#pragma GCC optimize("O3")
#pragma GCC target ("avx2")
#pragma GCC optimize("Ofast")
#pragma GCC target("sse,sse2,sse3,ssse3,sse4,popcnt,abm,mmx,avx,tune=native")
#pragma GCC optimize("unroll-loops")*/
#include <bits/stdc++.h>
#define file(data) freopen(data".in", "r", stdin); freopen(data".out", "w", stdout);
#define pb push_back
#define all(data) data.begin(), data.end()
#define endl '\n'
#define ll long long
#define int long long
#define pii pair < int, int >
using namespace std;
const int N = 2e5 + 5;
int n, k, x[N], y[N];
long long get(int dv) {
    long long res1 = 0, res2 = 0, need = 0;
    for(int i = 1; i <= k; i++) {
        if(((x[i] + dv - 1) / dv + (y[i] + dv - 1) / dv) % 2 == 0) {
            res1++;
        } else {
            res2++;
        }
    }
    //cout << dv << " " << res1 + ((n / dv) * (n / dv)) / 2 * dv * dv - res2 << " " << res2 + ((n / dv) * (n / dv) + 1) / 2 * dv * dv - res1 << endl;
 
 
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Compilation message (stderr)

chessboard.cpp: In function 'long long int get(long long int)':
chessboard.cpp:22:35: warning: unused variable 'need' [-Wunused-variable]
   22 |     long long res1 = 0, res2 = 0, need = 0;
      |                                   ^~~~
chessboard.cpp: At global scope:
chessboard.cpp:34:1: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
   34 | main() {
      | ^~~~

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