Problem K. Kotlin Island
首先不用考虑描边(那样和不画这条边是一样的)。那么剩下的就是在长度和宽度内枚举了。显然可以知道长宽最多画 \((n - 1) / 2\) 和 \((m - 1) / 2\) 条线。
#include <bits/stdc++.h>
using namespace std;
int n, m, k;
char a[500][500];
int main(){
freopen("kotlin.in", "r", stdin);
freopen("kotlin.out", "w", stdout);
cin >> n >> m >> k;
int l1 = (n - 1) / 2;
int l2 = (m - 1) / 2;
if(k > (l1 + 1) * (l2 + 1)){
puts("Impossible");
return 0;
}
int x1, x2;
bool flag = 0;
for(int i = 1; i <= l1 + 1; i++){
if(k % i == 0){
int j = k / i;
if(j >= 1 && j <= l2 + 1){
flag = 1;
x1 = i, x2 = j;
break;
}
}
}
if(!flag){
puts("Impossible");
}
else{
int num = 0;
for(int i = 2; i <= n; i += 2){
if(num == x1 - 1) break;
for(int j = 1; j <= m; j++){
a[i][j] = '#';
}
num++;
}
num = 0;
for(int j = 2; j <= m; j += 2){
if(num == x2 - 1) break;
for(int i = 1; i <= n; i++)
a[i][j]= '#';
num++;
}
for(int i = 1; i <= n; i++, puts("")){
for(int j = 1; j <= m; j++){
if(a[i][j] != '#') printf(".");
else printf("#");
}
}
}
return 0;
}
Problem A. Auxiliary Project
可以知道拿 \(7\) 是最赚的。在拿 \(7\) 会导致无法消耗完剩下的木棍时(余\(1\))时,不拿 \(7\) 而是一次性拿完剩下的能拿的最大的即可。
···cpp
include <bits/stdc++.h>
using namespace std;
define N 100010
vector
int main(){
freopen("auxiliary.in", "r", stdin);
freopen("auxiliary.out", "w", stdout);
G[2].push_back(1);
G[3].push_back(7);
G[4].push_back(4);
G[5].push_back(2);
G[5].push_back(3);
G[5].push_back(5);
G[6].push_back(6);
G[6].push_back(9);
G[6].push_back(0);
G[7].push_back(8);
for(int i = 2; i <= 7; i++){
sort(G[i].begin(), G[i].end(), [](int a, int b) -> bool {return a > b; });
}
int n; cin >> n;
int ans = 0;
while(n - 3 >= 2){
n -= 3;
ans += 7;
}
ans += G[n][0];
cout << ans << endl;
}
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From: https://www.cnblogs.com/wondering-world/p/17038860.html