Submission #171135

#	Time	Username	Problem	Language	Result	Execution time	Memory
171135		juggernaut	Gift (IZhO18_nicegift)	C++14	0 / 100	2043 ms	147720 KiB

nicegift

//Just try and the idea will come!
#include<bits/stdc++.h>
#define int long long int
using namespace std;
priority_queue<pair<int,int>>q;
int n,k,i,x;
pair<int,int>a,b;
vector<pair<int,int>>ans;
main(){
    scanf("%lld%lld",&n,&k);
    for(i=0;i<n;i++){
        scanf("%lld",&x);
        q.push({x,i+1});
    }
    while(!q.empty()){
        if(q.size()==1){
            puts("-1");
            return 0;
        }
        a=q.top();
        q.pop();
        b=q.top();
        q.pop();
        ans.push_back({b.second,a.second});
        if(a.first!=1)q.push({a.first-1,a.second});
        if(b.first!=1)q.push({b.first-1,b.second});
    }
    for(auto res:ans)printf("1 %lld %lld\n",res.first,res.second);
}

Compilation message (stderr)

nicegift.cpp:9:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
 main(){
      ^
nicegift.cpp: In function 'int main()':
nicegift.cpp:10:10: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
     scanf("%lld%lld",&n,&k);
     ~~~~~^~~~~~~~~~~~~~~~~~
nicegift.cpp:12:14: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
         scanf("%lld",&x);
         ~~~~~^~~~~~~~~~~

• Subtask 1: 0 / 7
• Subtask 2: 0 / 11
• Subtask 3: 0 / 12
• Subtask 4: 0 / 19
• Subtask 5: 0 / 51