PAT沙漏

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#include <cstdio>
#include <iostream>

using namespace std;

int num[1004];
int rest[1004];

void preHandle(){
int sum = 1;
int cnt = 1;
for (int i = 1; i < 1004; ++i) {
if (i >= sum) {
cnt += 2;
sum += cnt * 2;
}
num[i] = cnt - 2;
rest[i] = i + cnt * 2 - sum;

}
}
int main(){

preHandle();

int n;
char ch;
cin >> n >> ch;
int size = num[n];
for (int j = 0; j < size; ++j){
for (int i = 0; i < size; ++i) {
if ((j <= i && j <= size - 1 - i) || (j >= i && j >= size - 1 - i)) {
cout << ch;
}
else if ((j > i && j < size - 1 - i)) {
cout << ‘ ‘;
}
else{
break;
}
}
cout << endl;
}

cout << rest[n] << endl;
return 0;
}

PAT沙漏

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原文地址：http://www.cnblogs.com/code666/p/5836705.html