Compilare: main.cpp: In function 'void solve(int, int, int, int)': main.cpp:14:9: warning: unused variable 'w' [-Wunused-variable] int w, cnt = 0; ^ main.cpp: In function 'int main()': main.cpp:25:11: warning: unused variable 'fin' [-Wunused-variable] FILE *fin = freopen("qxy.in","r",stdin); ^~~ main.cpp:28:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&n); ^ main.cpp:30:23: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&x); ^ main.cpp:34:19: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d",&Q); ^ main.cpp:36:41: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d %d %d %d",&i,&j,&x,&y); ^