uva_1422 Processor

  1 #include <cmath>
  2 #include <cstdio>
  3 #include <cstring>
  4 #include <cstdlib>
  5 #include <ctime>
  6 #include <set>
  7 #include <map>
  8 #include <list>
  9 #include <stack>
 10 #include <queue>
 11 #include <string>
 12 #include <vector>
 13 #include <fstream>
 14 #include <iterator>
 15 #include <iostream>
 16 #include <algorithm>
 17 using namespace std;
 18 #define LL long long
 19 #define INF 0x3f3f3f3f
 20 #define MOD 1000000007
 21 #define eps 1e-6
 22 #define MAXN 10010
 23 #define MAXM 100
 24 #define dd {cout<<"debug"<<endl;}
 25 #define pa {system("pause");}
 26 #define p(x) {printf("%d\n", x);}
 27 #define pd(x) {printf("%.7lf\n", x);}
 28 #define k(x) {printf("Case %d: ", ++x);}
 29 #define s(x) {scanf("%d", &x);}
 30 #define sd(x) {scanf("%lf", &x);}
 31 #define mes(x, d) {memset(x, d, sizeof(x));}
 32 #define do(i, x) for(i = 0; i < x; i ++)
 33 #define dod(i, x, l) for(i = x; i >= l; i --)
 34 #define doe(i, x) for(i = 1; i <= x; i ++)
 35 struct node
 36 {
 37     int l;
 38     int r;
 39     int t;
 40     int no;
 41     bool operator < (const struct node &y) const
 42     {
 43         return r > y.r;
 44     }
 45 };
 46 int n, sum;
 47 struct node f[MAXN];
 48 int w[MAXN];    
 49 bool cmp(const struct node &x, const struct node &y)
 50 {
 51     return x.l == y.l? x.r < y.r : x.l < y.l;
 52 }
 53 void read()
 54 {
 55     sum = 0;
 56     scanf("%d", &n);
 57     for(int i = 0; i < n; i ++)
 58     {
 59         scanf("%d %d %d", &f[i].l, &f[i].r, &f[i].t);
 60         sum += f[i].t;
 61         f[i].no = i;
 62     }
 63     sort(f, f + n, cmp);
 64 }
 65 bool is_ok(int x)
 66 {
 67     priority_queue <struct node> Q;
 68     for(int i = 0; i < n; i ++)
 69         w[f[i].no] = f[i].t;
 70     int i = 0;
 71     int pos = 1;
 72     while(true)
 73     {
 74         while(i < n && f[i].l <= pos) Q.push(f[i ++]);
 75 
 76         int ts = x;
 77         while(!Q.empty() && ts)
 78         {
 79             struct node temp = Q.top();
 80 
 81             if(temp.r <= pos) return false;
 82 
 83             w[temp.no] -= ts;
 84             if(w[temp.no] > 0)
 85                 ts = 0;
 86             else if(w[temp.no] <= 0)
 87             {
 88                 ts = -w[temp.no];
 89                 Q.pop();
 90             }
 91         }
 92 
 93         if(i == n && Q.empty()) return true;
 94         pos ++;
 95     }
 96     return false;
 97 }
 98 int get_ans()
 99 {
100     int l = 1, r = sum;
101     while(l <= r)
102     {
103         int mid = (l + r) / 2;
104         if(is_ok(mid))
105             r = mid - 1;
106         else 
107             l = mid + 1;
108     }
109     return l;
110 }
111 
112 int main()
113 {
114     int T;
115     scanf("%d", &T);
116     while(T --)
117     {
118         read();
119         printf("%d\n", get_ans());
120     }
121     return 0;
122 }