Compilare: main.cpp: In function 'int main()': main.cpp:31:20: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j=0; j<s.size(); j++) ~^~~~~~~~~ main.cpp:58:9: warning: unused variable 'minn' [-Wunused-variable] int minn=9999999,p1,p2; ^~~~ main.cpp:66:32: warning: 'p2' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << p1 << " " << p2 << "\n"; ^~~~ main.cpp:66:19: warning: 'p1' may be used uninitialized in this function [-Wmaybe-uninitialized] fout << p1 << " " << p2 << "\n"; ^~~ main.cpp:55:29: warning: 'y2' may be used uninitialized in this function [-Wmaybe-uninitialized] int pasi = 1 + (a[x2][y2] - 1)/2; ~~~~~~~~^ main.cpp:52:22: warning: 'y1' may be used uninitialized in this function [-Wmaybe-uninitialized] lee_a (x1, y1, 2); ^ main.cpp:55:29: warning: 'x2' may be used uninitialized in this function [-Wmaybe-uninitialized] int pasi = 1 + (a[x2][y2] - 1)/2; ~~~~~~~~^ main.cpp:52:22: warning: 'x1' may be used uninitialized in this function [-Wmaybe-uninitialized] lee_a (x1, y1, 2); ^