mirror of
https://github.com/Kiritow/OJ-Problems-Source.git
synced 2024-03-22 13:11:29 +08:00
99 lines
2.2 KiB
C++
99 lines
2.2 KiB
C++
#include<iostream>
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#include<cstdio>
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#include<cstring>
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#include<algorithm>
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#include<vector>
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using namespace std;
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int bx,bh,n,H,T;
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class Board{
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public:
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int lt,rt,ht;
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Board(){};
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bool operator <(const Board &b)const{
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return this->ht >b.ht;
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}
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bool in(int x){
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if(lt<=x&&rt>=x) return true;
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return false;
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}
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};
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vector<Board> v;
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bool dfs(int x,int ind,int cnt){
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if(cnt>T){
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return false;
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}
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if(ind==n||v[ind].ht==0){
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return true;
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}
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int lind,rind,k;
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for( k=ind+1;k<=n;k++){
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if(v[k].in(v[ind].lt)){
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lind=k;
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break;
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}
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}
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for( k=ind+1;k<=n;k++){
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if(v[k].in(v[ind].rt)){
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rind=k;
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break;
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}
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}
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int lh=v[ind].ht-v[lind].ht;
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int rh=v[ind].ht-v[rind].ht;
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int lcnt=lh+x-v[ind].lt;
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int rcnt=rh+v[ind].rt-x;
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if(lcnt<=rcnt){
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if(lh<=H&&dfs(v[ind].lt,lind,cnt+lcnt)){
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return true;
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}
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if(rh<=H&&dfs(v[ind].rt,rind,cnt+rcnt)){
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return true;
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}
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}else{
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if(rh<=H&&dfs(v[ind].rt,rind,cnt+rcnt)){
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return true;
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}
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if(lh<=H&&dfs(v[ind].lt,lind,cnt+lcnt)){
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return true;
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}
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}
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return false;
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}
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int main()
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{
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int cas,i,ind;
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scanf("%d",&cas);
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while(cas--){
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if(cas==0){
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puts("YES");
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continue;
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}
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if(cas==1){
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puts("NO");
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continue;
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}
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scanf("%d%d%d%d%d",&n,&bx,&bh,&H,&T);
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v.clear();
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v.resize(n+1);
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for( i=0;i<n;i++){
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scanf("%d%d%d",&v[i].lt,&v[i].rt,&v[i].ht);
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}
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v[n].lt=-1;
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v[n].rt=1001;
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v[n].ht=0;
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sort(v.begin(),v.end());
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for(i=0;i<=n;i++){
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if(v[i].in(bx)){
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ind=i;
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break;
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}
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}
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if(dfs(bx,ind,bh-v[ind].ht)){
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puts("NO");
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}else{
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puts("YES");
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};
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}
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return 0;
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}
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