Ice cream

input/code.cpp: In function 'int main()':
input/code.cpp:40:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare]
         for(int a=0;a<po.size();a++){
                               ^
input/code.cpp:33:18: warning: 'clw' may be used uninitialized in this function [-Wmaybe-uninitialized]
     if((x/2-p[clw])>=0) cout << 2*lw << endl;
                  ^
input/code.cpp:36:20: warning: 'lw' may be used uninitialized in this function [-Wmaybe-uninitialized]
         int left=x-lw;
                    ^

#include <iostream>     // for(int i=0;i<n;i++){}
#include <stdio.h>
#include <ctype.h>
#include <iomanip>      // setprecision cout<<fixed<<setprecision(10)<<ans;
#include <cmath>
#include <string>
#include <vector>
#include <stack>
#include <locale>
#include <sstream>
#include <algorithm>
#include <queue>
#include <string.h>

using namespace std;

int main()
{
    int n,x,lw,clw;
    cin >> n >> x;
    vector<long long>p(n); vector<long long>w(n);
    for(int a=0;a<n;a++){
        cin >> p[a] >> w[a] ;
    }
    for(int a=0;a<n;a++){
        if(p[a]<x){
        if(a==0){ lw=w[a]; clw=a;}
        else{
            if(w[a]>lw) lw=w[a]; clw=a;
        }
        }
    }
    if((x/2-p[clw])>=0) cout << 2*lw << endl;
    else{
        vector<long long>po;
        int left=x-lw;
        for(int a=0;a<n;a++){
            if(p[a]<left) po.push_back(lw+w[a]);
        }
        for(int a=0;a<po.size();a++){
            if(a==0) lw=po[a];
            else{
            if(po[a]>lw) lw=po[a];
            }
        }
        cout << lw << endl;
    }
}

Test 1

Verdict: ACCEPTED

Test 2

Verdict: WRONG ANSWER

Test 3

Verdict: ACCEPTED

Test 4

Verdict: ACCEPTED

Test 5

Verdict: WRONG ANSWER

Test 6

Verdict: WRONG ANSWER

Test 7

Verdict: WRONG ANSWER

Test 8

Verdict: ACCEPTED

Test 9

Verdict: ACCEPTED

Test 10

Verdict: WRONG ANSWER