designated_cities.cpp: In function 'void dfs1(int, int, long long int)':
designated_cities.cpp:94:5: warning: unused variable 'res' [-Wunused-variable]
ll res = 0;
^~~
designated_cities.cpp: At global scope:
designated_cities.cpp:150:6: warning: ISO C++ forbids declaration of 'main' with no type [-Wreturn-type]
main() {
^
designated_cities.cpp: In function 'int main()':
designated_cities.cpp:190:9: warning: unused variable 'w' [-Wunused-variable]
int w = tto.sc;
^
designated_cities.cpp:151:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &n);
~~~~~^~~~~~~~~~
designated_cities.cpp:158:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d %d %d %d", &a, &b, &c, &d);
~~~~~^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
designated_cities.cpp:200:7: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &q);
~~~~~^~~~~~~~~~
designated_cities.cpp:203:8: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result]
scanf("%d", &x);
~~~~~^~~~~~~~~~