0_0_1830561_26200.cpp:19: error: `main' must return `int'
0_0_1830561_26200.cpp: In function `int main(...)':
0_0_1830561_26200.cpp:21: error: `_int64' undeclared (first use this function)
0_0_1830561_26200.cpp:21: error: (Each undeclared identifier is reported only once for each function it appears in.)
0_0_1830561_26200.cpp:21: error: expected `;' before "ys"
0_0_1830561_26200.cpp:24: error: `ys' undeclared (first use this function)
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