Compilare: user.cpp: In function ‘int main()’: user.cpp:24:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(i=1;i<=N;i++) ^~~ user.cpp:30:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ sn*=-1; ^~ user.cpp:40:5: warning: this ‘for’ clause does not guard... [-Wmisleading-indentation] for(j=1;j<=M;j++) ^~~ user.cpp:46:9: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the ‘for’ sn*=-1; ^~