CodeForces

最近不知为何，心烦意乱，各种事情都能引起我的烦躁， 难道是传说中的经前综合症？？ 格老子！！！

或许我知道问题出在哪儿，，，是啊，青春期来的晚啊，情窦初开，，，遇到了感情问题了恐怕，，各中吃醋？？？ 2333333333333333 

何不放烂形骸，心出穹顶外

#include <iostream>#include <cstdio>#include <cstdlib>#include <cstring>#include <string>#include <cmath>#include <set>#include <map>#include <stack>#include <queue>#include <ctype.h>#include <vector>#include <algorithm>#include <sstream>#define PI acos(-1.0)#define in freopen("in.txt", "r", stdin)#define out freopen("out.txt", "w", stdout)using namespace std;typedef long long ll;const int maxn = 20 + 7, INF = 0x3f3f3f3f, mod = 1e9 + 7;int n;int a[maxn];int find_() {    if(n <= 0) return 0;    for(int i = 2; i < 1000; ++i) {        int t = i*(i-1)/2;        if(t > n) { n -= (t-i+1); return i-1; }    }}int main() {    scanf("%d", &n);    memset(a, 0, sizeof a);    for(int i = 0; i < 26; ++i) {        a[i] = find_();        if(a[i] == 0) break;    }    if(a[0] == 0) cout << 'a' << endl;    for(int i = 0; i < 26 && a[i]; ++i) {        for(int j = 0; j < a[i]; ++j)            printf("%c", (char)(i+'a'));    }    return 0;}