Submission #433560

#	Time	Username	Problem	Language	Result	Execution time	Memory
433560		SAAD	Connecting Supertrees (IOI20_supertrees)	C++17	Compilation error	0 ms	0 KiB

supertrees

#include <iostream>
#include <math.h>
#include <algorithm>
#include <vector>
#include "supertrees.h"
using namespace std;
int construct( vector<vector<int>> p) {
    vector<vector<int>> a = p;
    for (int i = 0; i < a.size(); i++) {
        for (int j = 0; j < a.size(); j++) {
            if (abs(i - j) == 1)
                a[i][j] = 1;
            else a[i][j] = 0;
        }
    }
   return build(a);
}

Compilation message (stderr)

supertrees.cpp: In function 'int construct(std::vector<std::vector<int> >)':
supertrees.cpp:9:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
    9 |     for (int i = 0; i < a.size(); i++) {
      |                     ~~^~~~~~~~~~
supertrees.cpp:10:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::vector<int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare]
   10 |         for (int j = 0; j < a.size(); j++) {
      |                         ~~^~~~~~~~~~
supertrees.cpp:16:16: error: void value not ignored as it ought to be
   16 |    return build(a);
      |           ~~~~~^~~