Compilare: main.cpp: In function 'int solve()': main.cpp:109:11: warning: unused variable 'last' [-Wunused-variable] stare last = {0, 0}, Max = {0, 0}; ^~~~ main.cpp:109:26: warning: unused variable 'Max' [-Wunused-variable] stare last = {0, 0}, Max = {0, 0}; ^~~ main.cpp: In function 'int main()': main.cpp:136:38: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("popcorn.in", "r", stdin); ^ main.cpp:137:40: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("popcorn.out", "w", stdout); ^ main.cpp:139:26: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d", &n, &m); ^ main.cpp:142:36: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &x, &y, &c); ^