Compilare: main.cpp: In function 'int main()': main.cpp:11:13: warning: suggest parentheses around '+' inside '>>' [-Wparentheses] in >> c + 1; ~~^~~ main.cpp:12:5: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for (n = 1; c[n]; n++); n--; ^~~ main.cpp:12:29: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' for (n = 1; c[n]; n++); n--; ^ main.cpp:9:8: warning: unused variable 'j' [-Wunused-variable] {int i,j,k = 0,sol = 0,n; ^ main.cpp:23:9: warning: unused variable 'grup' [-Wunused-variable] int grup = 0; ^~~~