Compilare: main.cpp: In function 'void solve2()': main.cpp:142:35: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 142 | for (int i = 0; i < sums.size(); i++) { | ~~^~~~~~~~~~~~~ main.cpp:149:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 149 | for (int i = 0; i < sums.size() - 1; i += 2) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:152:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 152 | if (i < sums.size() - 2) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:166:43: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 166 | for (int i = 1; i < sums.size() - 1; i += 2) { | ~~^~~~~~~~~~~~~~~~~ main.cpp:169:39: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<long long int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 169 | if (i < sums.size() - 2) { | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int closestFibo(int)': main.cpp:69:32: warning: 'idx' may be used uninitialized [-Wmaybe-uninitialized] 69 | int dif1 = x - fibo[idx], dif2 = fibo[idx + 1] - x; | ^ main.cpp:57:43: note: 'idx' was declared here 57 | int st = 0, dr = fibo.size() - 1, idx; | ^~~