Language: C++

#include <iostream>
#include <vector>
#include <cmath>
#include <algorithm>
#include <numeric>
#include <unordered_map>
 
using namespace std;
typedef long long ll;
 
int main()
{
    ll N;
    cin >> N;
    ll* x = new ll[N];
    ll* y = new ll[N];
    ll* h = new ll[N];

    ll** pos = new ll*[101];
    for(ll i = 0; i < 101; i ++){
        pos[i] = new ll[101];
        for(ll n = 0; n < 101; n ++){
            pos[i][n] = -1;
        }
    }

    for(ll i = 0; i < N; i ++){
        cin >> x[i] >> y[i] >> h[i];
    }

    for(ll i = 0; i < N; i ++){
        if(h[i] == 0){
            continue;
        }
        for(ll j = 0; j < 101; j ++){
            for(ll m = 0; m < 101; m ++){
                ll height = h[i] + abs(x[i] - j) + abs(y[i] - m);
                if(height > 1000000000){
                    pos[j][m] = -999;
                }
                else if(pos[j][m] == -1){
                    pos[j][m] = height;
                }
                else if(pos[j][m] != height){
                    pos[j][m] = -999;
                }
            }
        }
    }
    for(ll j = 0; j < 101; j ++){
        for(ll m = 0; m < 101; m ++){
            if(pos[j][m] == -1){
                pos[j][m] = 1;
            }
        }
    }

    for(ll i = 0; i < N; i ++){
        if(h[i] != 0){
            continue;
        }
        pos[x[i]][y[i]] = -999;
        for(ll j = 0; j < 101; j ++){
            for(ll m = 0; m < 101; m ++){
                if(pos[j][m] <= 0){
                    continue;
                }
                ll height = pos[j][m] - abs(x[i] - j) - abs(y[i] - m);
                if(height > 0){
                    pos[j][m] = -999;
                }
            }
        }
    }



    /*for(ll i = 0; i < N; i ++){
        for(ll n = 0; n < N; n ++){
            if(i == n){
                continue;
            }
            for(ll j = 0; j < 101; j ++){
                for(ll m = 0; m < 101; m ++){
                    if (h[i] == 0 && h[i] == 0){
                    }
                    else if (h[i] == 0){
                        pos[x[i]][y[i]] = false;
                        ll height = h[n] + abs(x[n] - j) + abs(y[n] - m);
                        ll height2 = height - abs(x[i] - j) - abs(y[i] - m);
                        if(height2 <= 0){
                            if(pos[j][m] == -1){
                                pos[j][m] = height;
                            }
                            else if(pos[j][m] != height){
                                pos[j][m] = -999;
                            }
                        }
                        else{
                            pos[j][m] = -999;
                        }
                    }
                    else if (h[n] == 0){
                        pos[x[n]][y[n]] = false;
                        ll height = h[i] + abs(x[i] - j) + abs(y[i] - m);
                        ll height2 = height - abs(x[n] - j) - abs(y[n] - m);
                        if(height2 <= 0){
                            if(pos[j][m] == -1){
                                pos[j][m] = height;
                            }
                            else if(pos[j][m] != height){
                                pos[j][m] = -999;
                            }
                        }
                        else{
                            pos[j][m] = -999;
                        }
                    }
                    else{
                        ll height = h[i] + abs(x[i] - j) + abs(y[i] - m);
                        ll height2 = height - abs(x[n] - j) - abs(y[n] - m);
                        if(height2 == h[n]){
                            if(pos[j][m] == -1){
                                pos[j][m] = height;
                            }
                            else if(pos[j][m] != height){
                                pos[j][m] = -999;
                            }
                        }
                        else{
                            pos[j][m] = -999;
                        }
                    }
                }
            }
        }
    }*/
    for(ll i = 0; i < 101; i ++){
        for(ll n = 0; n < 101; n ++){
            if(pos[i][n] >= 1){
                cout << i << " " << n << " " << (h[0] + abs(x[0] - i) + abs(y[0] - n));
                return;
            }
        }
    }

    while(true){
        
    }

    return 0;
}

Compiler output:
a.cc: In function 'int main()':
a.cc:142:17: error: return-statement with no value, in function returning 'int' [-fpermissive]
  142 |                 return;
      |                 ^~~~~~