UVA - 1346 Songs (贪心+排序)
生活随笔
收集整理的這篇文章主要介紹了
UVA - 1346 Songs (贪心+排序)
小編覺得挺不錯的,現在分享給大家,幫大家做個參考.
題意:已知每首歌的標號,長度和播放頻率,求一種播放順序,使得最小,并且輸出該播放順序下第t首歌的標號。
分析:
1、長度越短,播放頻率越大的歌排在前面,上式越小。
2、s(i)表示的是當前播放順序下這首歌是第幾個播放。
#include<cstdio> #include<cstring> #include<cstdlib> #include<cctype> #include<cmath> #include<iostream> #include<sstream> #include<iterator> #include<algorithm> #include<string> #include<vector> #include<set> #include<map> #include<stack> #include<deque> #include<queue> #include<list> #define lowbit(x) (x & (-x)) const double eps = 1e-8; inline int dcmp(double a, double b){if(fabs(a - b) < eps) return 0;return a > b ? 1 : -1; } typedef long long LL; typedef unsigned long long ULL; const int INT_INF = 0x3f3f3f3f; const int INT_M_INF = 0x7f7f7f7f; const LL LL_INF = 0x3f3f3f3f3f3f3f3f; const LL LL_M_INF = 0x7f7f7f7f7f7f7f7f; const int dr[] = {0, 0, -1, 1, -1, -1, 1, 1}; const int dc[] = {-1, 1, 0, 0, -1, 1, -1, 1}; const int MOD = 1e9 + 7; const double pi = acos(-1.0); const int MAXN = 70000 + 10; const int MAXT = 10000 + 10; using namespace std; struct Node{int id, len;double f;double k;void read(){scanf("%d%d%lf", &id, &len, &f);k = len / f;}bool operator < (const Node&rhs)const{return k < rhs.k;} }num[MAXN]; int main(){int n;while(scanf("%d", &n) == 1){for(int i = 1; i <= n; ++i){num[i].read();}sort(num + 1, num + 1 + n);int t;scanf("%d", &t);printf("%d\n", num[t].id);}return 0; }?
轉載于:https://www.cnblogs.com/tyty-Somnuspoppy/p/7380430.html
總結
以上是生活随笔為你收集整理的UVA - 1346 Songs (贪心+排序)的全部內容,希望文章能夠幫你解決所遇到的問題。
- 上一篇: 按键中断总结
- 下一篇: vansauthentic和vanssk