一直向前搜。。做法有点像模拟。但是要用到出队入队,有点像搜索。
代码:
#include <iostream> #include <cstdio> #include <cstring> #include <cmath> #include <algorithm> #include <queue> using namespace std; #define N 100003 struct node { int p,d; bool operator <(const node &a)const { if(p == a.p) return d>a.d; return p>a.p; } }stone[N]; int maxdis; priority_queue<node> que; void GO() { node now,next; int OE = 1; while(!que.empty()) { now = que.top(); que.pop(); if(OE) { next.p = now.p + now.d; next.d = now.d; que.push(next); maxdis = max(next.p,maxdis); OE = 0; } else OE = 1; } } int main() { int t,i,p,d,n; scanf("%d",&t); while(t--) { maxdis = 0; scanf("%d",&n); for(i=0;i<n;i++) { scanf("%d%d",&stone[i].p,&stone[i].d); que.push(stone[i]); } GO(); printf("%d ",maxdis); } return 0; }