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Copy pathA_Dragons.cpp
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61 lines (57 loc) · 1.45 KB
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#include<bits/stdc++.h>
using namespace std;
typedef long long int ll;
typedef long double ld;
typedef string str;
typedef vector<ll> vll;
typedef vector<string> vs;
typedef vector<pair<ll, ll>> vpl;
typedef set<ll> sll;
typedef map<ll,ll> mll;
typedef pair<int,int> pint;
typedef pair<ll,ll> pll;
double pi = acos(-1.0);
#define debug(x) cerr<<#x<<" "<<x<<endl;
#define loop for(ll i=1; i<=n; i++)
#define all(a) (a).begin(), (a).end()
#define min3(a,b,c) min(a,min(b,c))
#define max3(a,b,c) max(a,max(b,c))
#define min4(a,b,c,d) min(a,min(b,min(c,d)));
#define max4(a,b,c,d) max(a,max(b,max(c,d)));
int main()
{
int n,s,i,j;
bool flag=true;
cin>>s>>n;
int a[n][2];
for(i=0;i<n;i++)
{
for(j=0;j<2;j++)
{
cin>>a[i][j];
}
}
for(i=0;i<n;i++)
{
for(j=i+1;j<n;j++)
{
if(a[j][0]<a[i][0])
{
swap(a[j][0],a[i][0]);
swap(a[j][1],a[i][1]);
}
}
}
for(i=0;i<n;i++)
{
if(s>a[i][0])
s+=a[i][1];
else
{
flag=false;
break;
}
}
if(flag) cout<<"YES";
else cout<<"NO";
}