Compilare: main.cpp: In function 'int main()': main.cpp:8:15: warning: unused variable 'm' [-Wunused-variable] int t=0,n,m,i,j,st,dr; ^ main.cpp:8:19: warning: unused variable 'j' [-Wunused-variable] int t=0,n,m,i,j,st,dr; ^ main.cpp:9:10: warning: unused variable 'ch' [-Wunused-variable] char ch; ^~ main.cpp:6:39: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("permutari3.in","r",stdin); ^ main.cpp:7:41: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("permutari3.out","w",stdout); ^ main.cpp:10:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:13:32: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&v[i].first); ^