NC16669|NC16669 明明的随机数unique或者set去重 NC16669明明的随机数unique或者

【NC16669|NC16669 明明的随机数unique或者set去重】题意: 给定一个数组,打印排序去重后的数组

用set可以
用unique也可以

#ifdef debug #include #include "/home/majiao/mb.h" #endif#include #include #include #include #include #include #include #include #include #define MAXN ((int)1e5+7) #define ll long long int #define INF (0x7f7f7f7f) #define QAQ (0)using namespace std; #ifdef debug #define show(x...) \ do { \ cout << "\033[31; 1m " << #x << " -> "; \ err(x); \ } while (0) void err() { cout << "\033[39; 0m" << endl; } #endiftemplate void err(T a, A... x) { cout << a << ' '; err(x...); }int n, m, Q, K, a[MAXN]; int main() { #ifdef debug freopen("test", "r", stdin); clock_t stime = clock(); #endif scanf("%d ", &n); for(int i=1; i<=n; i++) scanf("%d ", a+i); sort(a+1, a+1+n); m = std::unique(a+1, a+1+n)-(a+1); printf("%d\n", m); for(int i=1; i<=m; i++) { printf("%d%c", a[i], i==n?'\n':' '); }#ifdef debug clock_t etime = clock(); printf("rum time: %lf 秒\n",(double) (etime-stime)/CLOCKS_PER_SEC); #endif return 0; }