This submission is migrated from previous version of oj.uz, which used different machine for grading. This submission may have different result if resubmitted.
#include <bits/stdc++.h>
using namespace std;
#define int long long
#define FASTIO ios_base::sync_with_stdio(false); cin.tie(NULL); cout.tie(NULL);
#define all(x) (x).begin(), (x).end()
#define pb push_back
#define pii pair<int, int>
#define ff first
#define ss second
#define PI acos(-1)
#define ld long double
const int mod = 1e9+7, N = 2e5+5;
int msb(int val){return sizeof(int)*8-__builtin_clzll(val);}
int a[N], n, m, k;
void solve(int test_case){
int i, j;
cin >> n >> k;
int sum = 0;
vector<pii> v;
for(i=0;i<n;i++){
cin >> a[i];
sum += a[i];
v.pb({a[i], i+1});
}
if(sum%k !=0){
cout << -1 << '\n';
return;
}
vector<vector<int>> ans;
while(true){
sort(all(v));
if(v.back().ff == 0)break;
int sz = v.size()-1;
int mn = min(v[sz].ff, v[sz-1].ff);
v[sz].ff-=mn;
v[sz-1].ff-=mn;
ans.pb({mn,v[sz].ss, v[sz-1].ss});
assert(ans.size() <= 2000000);
}
cout << ans.size() << '\n';
for(auto X : ans){
for(auto x : X)cout << x << ' ';
cout << '\n';
}
return;
}
signed main(){
FASTIO;
#define MULTITEST 0
#if MULTITEST
int ___T;
cin >> ___T;
for(int T_CASE = 1; T_CASE <= ___T; T_CASE++)
solve(T_CASE);
#else
solve(1);
#endif
return 0;
}
Compilation message (stderr)
nicegift.cpp: In function 'void solve(long long int)':
nicegift.cpp:17:9: warning: unused variable 'j' [-Wunused-variable]
17 | int i, j;
| ^
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |
# | Verdict | Execution time | Memory | Grader output |
---|
Fetching results... |