#include <stdio.h>
#include <iostream>
#include <math.h>
#include <iomanip>
using namespace std;
int main()
{
	int a,b,c;
	cin >>a >>b >>c;
	if(a+b>c && b+c>a && c+a>b)
	{
		cout<<"yes";
	}
	else
	{
		cout<<"no";
	}
}

#include<iostream>

#include<algorithm>

using namespace std;

int main(){

int a,b,c,d;

cin>>a>>b>>c;

if(a>b){

    d=b;


    b=a;
    a=d;

}

if(b>c){

    d=c;


    c=b;

    b=d;

}

if(a>b){

    d=b;

    b=a;

    a=d;

}

if(a+b>c){
    cout<<"yes";

}else{


    if(a+b<=c){
        cout<<"no";

    }

}

}

#include<iostream> #include<cstdio> #include<iomanip> #include<cmath> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; if(a+b>c){if (c+b>a){if(a+c>b){cout<<"yes"; }else{cout<<"no";} }else{cout<<"no";} }else{cout<<"no";} return 0; }

#include <iostream> using namespace std;

int main() { int a,b,c; cin >> a >> b >> c; if((a + b > c) && (a + c > b) && (b + c > a)) { cout << "yes" << endl; } else { cout << "no" << endl; } return 0; }

#include<iostream> #include<cstdio> #include<iomanip> #include<cmath> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; if(a+b>c){if (c+b>a){if(a+c>b){cout<<"yes"; }else{cout<<"no";} }else{cout<<"no";} }else{cout<<"no";} return 0; }

#include<iostream>
#include<cstdio>
#include<string>
#include<bits/stdc++.h>
#define LL long long
using namespace std;
const int INF=0x3f3f3f3f;
const int N=2e5+10;
int a,b,c;
int main(){
	cin>>a>>b>>c;
	if(max(a,max(b,c))<min(a,min(b,c))+a+b+c-max(a,max(b,c))-min(a,min(b,c))){
		cout<<"yes";
	}else{
		cout<<"no";
	}
}

#include <bits/stdc++.h>
using namespace std;
int main()
{
	int a , b , c;
	cin >> a >> b >> c;
	if( a + b > c && c + b > a && c + a > b )
	{
		cout << "yes";
	}
	else
	{
		cout << "no";
	}
	return 0;
}

#include<bits/stdc++.h> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; if(a+b>c&&a+c>b&&b+c>a) cout<<"yes"; else cout<<"no"; return 0; }

#include<iostream> using namespace std; int main() { int a,b,c; cin>>a>>b>>c; if(a+b>c && a+c>b && c+b>a) { cout<<"yes"; } else { cout<<"no"; } return 0; }