Compilare: user.cpp: In function ‘void dfs(short int, short int)’: user.cpp:33:61: warning: narrowing conversion of ‘(((int)x) + dl[((int)p)])’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] else viz[x + dl[p]][y + dc[p]] = 1, s.insert({x + dl[p], y + dc[p]}); ^ user.cpp:33:72: warning: narrowing conversion of ‘(((int)y) + dc[((int)p)])’ from ‘int’ to ‘short int’ inside { } [-Wnarrowing] else viz[x + dl[p]][y + dc[p]] = 1, s.insert({x + dl[p], y + dc[p]}); ^ user.cpp: In function ‘int main()’: user.cpp:40:42: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%hd%hd", &nrlin, &nrcol); ^ user.cpp:44:40: warning: ignoring return value of ‘int fscanf(FILE*, const char*, ...)’, declared with attribute warn_unused_result [-Wunused-result] fscanf(fin, "%d", &m[i][j]); ^