Compilare: main.cpp: In function 'int bs1(int)': main.cpp:50:7: warning: unused variable 'ans' [-Wunused-variable] int ans = 0, l = 1, r = k, last = 1; ^~~ main.cpp: In function 'int bs2(int)': main.cpp:64:7: warning: unused variable 'ans' [-Wunused-variable] int ans = 0, l = 1, r = k, last = k + 1; ^~~ main.cpp: In function 'int main()': main.cpp:84:34: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("agora.in", "r", stdin); ^ main.cpp:85:36: warning: ignoring return value of 'FILE* freopen(const char*, const char*, FILE*)', declared with attribute warn_unused_result [-Wunused-result] freopen("agora.out", "w", stdout); ^ main.cpp:89:30: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d", &n, &m, &q); ^ main.cpp:92:42: warning: ignoring return value of 'int scanf(const char*, ...)', declared with attribute warn_unused_result [-Wunused-result] scanf("%d%d%d%d", &i1, &j2, &i2, &j1); ^