Compilare: main.cpp: In function 'int main()': main.cpp:64:9: warning: this 'for' clause does not guard... [-Wmisleading-indentation] for(int j=1; j<=n; j++) ^~~ main.cpp:66:13: note: ...this statement, but the latter is misleadingly indented as if it is guarded by the 'for' cout<<endl; ^~~~ main.cpp: In function 'void prec()': main.cpp:21:34: warning: iteration 1002 invokes undefined behavior [-Waggressive-loop-optimizations] com[i][j]=(com[i-1][j]+com[i][j-1])%1000000007; ~~~~~~~~~~^ main.cpp:19:23: note: within this loop for(int j=2; j<=1004; j++) ~^~~~~~